diff --git a/CMakeLists.txt b/CMakeLists.txt
index e7b584d9..4d4976fa 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -142,6 +142,7 @@ add_library(lego1 SHARED
   LEGO1/mxtimer.cpp
   LEGO1/mxtransitionmanager.cpp
   LEGO1/mxunknown100dc6b0.cpp
+  LEGO1/mxunknown100dc6e0.cpp
   LEGO1/mxvariabletable.cpp
   LEGO1/mxvideomanager.cpp
   LEGO1/mxvideoparam.cpp
diff --git a/LEGO1/act2brick.h b/LEGO1/act2brick.h
index d5703081..fd10a997 100644
--- a/LEGO1/act2brick.h
+++ b/LEGO1/act2brick.h
@@ -8,21 +8,21 @@
 class Act2Brick : public LegoPathActor
 {
 public:
-  Act2Brick();	
+  Act2Brick();
   virtual ~Act2Brick() override; // vtable+0x0
 
   virtual long Notify(MxParam &p) override; // vtable+0x4
   virtual long Tickle() override; // vtable+0x08
 
   // OFFSET: LEGO1 0x1007a360
-  inline virtual const char *ClassName() override // vtable+0x0c
+  inline virtual const char *ClassName() const override // vtable+0x0c
   {
     // 0x100f0438
     return "Act2Brick";
   }
 
   // OFFSET: LEGO1 0x1007a370
-  inline virtual MxBool IsA(const char *name) override // vtable+0x10
+  inline virtual MxBool IsA(const char *name) const override // vtable+0x10
   {
     return !strcmp(Act2Brick::ClassName(), name) || LegoEntity::IsA(name);
   }
diff --git a/LEGO1/compat.h b/LEGO1/compat.h
new file mode 100644
index 00000000..496fa4db
--- /dev/null
+++ b/LEGO1/compat.h
@@ -0,0 +1,14 @@
+#ifndef ISLECOMPAT_H
+#define ISLECOMPAT_H
+
+// Various macros to enable compiling with other/newer compilers.
+
+// Use `COMPAT_CONST` where something ought to be 'const', and a newer compiler would complain if it
+// wasn't, but we know it isn't 'const' in the original code.
+#ifdef __MINGW32__
+#define COMPAT_CONST const
+#else
+#define COMPAT_CONST
+#endif
+
+#endif // ISLECOMPAT_H
\ No newline at end of file
diff --git a/LEGO1/legobackgroundcolor.h b/LEGO1/legobackgroundcolor.h
index 812e8882..1daa6311 100644
--- a/LEGO1/legobackgroundcolor.h
+++ b/LEGO1/legobackgroundcolor.h
@@ -2,7 +2,8 @@
 #define LEGOBACKGROUNDCOLOR_H
 #include "mxstring.h"
 #include "mxcore.h"
-#include "MxStringVariable.h"
+#include "mxstringvariable.h"
+
 class LegoBackgroundColor : public MxStringVariable
 {
 public:
diff --git a/LEGO1/legoinputmanager.h b/LEGO1/legoinputmanager.h
index caafed52..c629134e 100644
--- a/LEGO1/legoinputmanager.h
+++ b/LEGO1/legoinputmanager.h
@@ -1,9 +1,9 @@
 #ifndef LEGOINPUTMANAGER_H
 #define LEGOINPUTMANAGER_H
 
-#include "mxcore.h"
+#include "mxpresenter.h"
 
-__declspec(dllexport) enum NotificationId
+enum NotificationId
 {
   NONE = 0,
   KEYDOWN = 7,
@@ -15,7 +15,7 @@ __declspec(dllexport) enum NotificationId
 
 // VTABLE 0x100d8760
 // SIZE 0x338
-class LegoInputManager
+class LegoInputManager : public MxPresenter
 {
 public:
   LegoInputManager();
@@ -27,7 +27,7 @@ class LegoInputManager
 
   virtual long Tickle() override; // vtable+0x8
 
-  char m_pad00[0x19C];
+  char m_pad00[0x15c];
   int m_joystickIndex;
   char m_pad200[0x194];
   MxBool m_useJoystick;
diff --git a/LEGO1/legoomni.cpp b/LEGO1/legoomni.cpp
index 365748e7..45f7a9f7 100644
--- a/LEGO1/legoomni.cpp
+++ b/LEGO1/legoomni.cpp
@@ -176,7 +176,7 @@ void LegoOmni::Init()
 }
 
 // OFFSET: LEGO1 0x10058e70
-MxResult LegoOmni::Create(MxOmniCreateParam &p)
+MxResult LegoOmni::Create(COMPAT_CONST MxOmniCreateParam &p)
 {
   // FIXME: Stub
   return SUCCESS;
diff --git a/LEGO1/legoomni.h b/LEGO1/legoomni.h
index 9d825ebc..512fba41 100644
--- a/LEGO1/legoomni.h
+++ b/LEGO1/legoomni.h
@@ -1,6 +1,7 @@
 #ifndef LEGOOMNI_H
 #define LEGOOMNI_H
 
+#include "compat.h"
 #include "legoentity.h"
 #include "legoinputmanager.h"
 #include "legogamestate.h"
@@ -51,7 +52,7 @@ class LegoOmni : public MxOmni
   }
 
   virtual void Init(); // vtable+14
-  virtual MxResult Create(MxOmniCreateParam &p); // vtable+18
+  virtual MxResult Create(COMPAT_CONST MxOmniCreateParam &p); // vtable+18
   virtual void Destroy(); // vtable+1c
   virtual void vtable20();
   virtual void vtable24(MxDSAction &ds);
diff --git a/LEGO1/legostate.cpp b/LEGO1/legostate.cpp
index 2b49fcd7..55637dc4 100644
--- a/LEGO1/legostate.cpp
+++ b/LEGO1/legostate.cpp
@@ -4,3 +4,8 @@
 LegoState::~LegoState()
 {
 }
+
+// OFFSET: LEGO1 0x10005f90
+MxBool LegoState::VTable0x14() {
+  return TRUE;
+}
diff --git a/LEGO1/legostate.h b/LEGO1/legostate.h
index be7289bc..904ad323 100644
--- a/LEGO1/legostate.h
+++ b/LEGO1/legostate.h
@@ -11,7 +11,7 @@ class LegoState : public MxCore
 
   // OFFSET: LEGO1 0x100060d0
   inline virtual const char *ClassName() const override // vtable+0x0c
-  { 
+  {
     // 0x100f01b8
     return "LegoState";
   }
@@ -22,6 +22,8 @@ class LegoState : public MxCore
     return !strcmp(name, LegoState::ClassName()) || MxCore::IsA(name);
   }
 
+  virtual MxBool VTable0x14();
+
 };
 
 #endif // LEGOSTATE_H
diff --git a/LEGO1/mxentity.cpp b/LEGO1/mxentity.cpp
index 526a03e2..7459dd24 100644
--- a/LEGO1/mxentity.cpp
+++ b/LEGO1/mxentity.cpp
@@ -11,3 +11,9 @@ MxEntity::~MxEntity()
 {
   // TODO
 }
+
+// OFFSET: LEGO1 0x10001070 STUB
+void MxEntity::Destroy()
+{
+  // TODO
+}
diff --git a/LEGO1/mxentity.h b/LEGO1/mxentity.h
index dda04646..7123abbf 100644
--- a/LEGO1/mxentity.h
+++ b/LEGO1/mxentity.h
@@ -23,6 +23,8 @@ class MxEntity : public MxCore
     return !strcmp(name, MxEntity::ClassName()) || MxCore::IsA(name);
   }
 
+  virtual void Destroy(); // vtable+0x1c
+
   // 0x8: MxResult
   // 0xc MxAtomId
 };
diff --git a/LEGO1/mxmediapresenter.h b/LEGO1/mxmediapresenter.h
index 3fb70d31..647150c4 100644
--- a/LEGO1/mxmediapresenter.h
+++ b/LEGO1/mxmediapresenter.h
@@ -15,14 +15,14 @@ class MxMediaPresenter : public MxPresenter
   virtual long Tickle() override; // vtable+0x8, override MxCore
 
   // OFFSET: LEGO1 0x1000c5c0
-  inline virtual const char *MxMediaPresenter::ClassName() const override // vtable+0xc
+  inline virtual const char *ClassName() const override // vtable+0xc
   {
     // 0x100f074c
     return "MxMediaPresenter";
   }
 
   // OFFSET: LEGO1 0x1000c5d0
-  inline virtual MxBool MxMediaPresenter::IsA(const char *name) const override // vtable+0x10
+  inline virtual MxBool IsA(const char *name) const override // vtable+0x10
   {
     return !strcmp(name, MxMediaPresenter::ClassName()) || MxPresenter::IsA(name);
   }
diff --git a/LEGO1/mxobjectfactory.h b/LEGO1/mxobjectfactory.h
index 57809be9..bdd172a8 100644
--- a/LEGO1/mxobjectfactory.h
+++ b/LEGO1/mxobjectfactory.h
@@ -9,4 +9,4 @@ class MxObjectFactory : public MxCore
 
 };
 
-#endif MXOBJECTFACTORY_H
+#endif // MXOBJECTFACTORY_H
diff --git a/LEGO1/mxomni.h b/LEGO1/mxomni.h
index 0e837ad1..dee03229 100644
--- a/LEGO1/mxomni.h
+++ b/LEGO1/mxomni.h
@@ -28,8 +28,9 @@ class MxOmni : public MxCore
   __declspec(dllexport) static void SetCD(const char *p_cd);
   __declspec(dllexport) static void SetHD(const char *p_hd);
   __declspec(dllexport) static void SetSound3D(MxBool p_3dsound);
-  
-  virtual ~MxOmni();
+
+  MxOmni();
+  virtual ~MxOmni() override;
 
   virtual long Notify(MxParam &p); // vtable+04
   virtual void Init(); // vtable+14
diff --git a/LEGO1/mxsoundmanager.cpp b/LEGO1/mxsoundmanager.cpp
index d12ecee1..275d0514 100644
--- a/LEGO1/mxsoundmanager.cpp
+++ b/LEGO1/mxsoundmanager.cpp
@@ -1,9 +1,9 @@
 #include "mxsoundmanager.h"
 
-// OFFSET: LEGO1 0x100ae740 STUB
+// OFFSET: LEGO1 0x100ae740
 MxSoundManager::MxSoundManager()
 {
-  // TODO
+  Init();
 }
 
 // OFFSET: LEGO1 0x100ae7d0 STUB
@@ -11,3 +11,11 @@ MxSoundManager::~MxSoundManager()
 {
   // TODO
 }
+
+// OFFSET: LEGO1 0x100ae830
+void MxSoundManager::Init()
+{
+  m_unk30 = 0;
+  m_unk34 = 0;
+}
+
diff --git a/LEGO1/mxsoundmanager.h b/LEGO1/mxsoundmanager.h
index 3421a5d6..4d74fa95 100644
--- a/LEGO1/mxsoundmanager.h
+++ b/LEGO1/mxsoundmanager.h
@@ -1,17 +1,21 @@
 #ifndef MXSOUNDMANAGER_H
 #define MXSOUNDMANAGER_H
 
-#include "mxcore.h"
+#include "mxunknown100dc6e0.h"
 
 // VTABLE 0x100dc128
 // SIZE 0x3c
 // Base vtables are: MxCore -> 0x100dc6b0 -> 0x100dc6e0 -> MxSoundManager
-class MxSoundManager
+class MxSoundManager : public MxUnknown100dc6e0
 {
 public:
   MxSoundManager();
   virtual ~MxSoundManager() override; // vtable+0x0
 
+private:
+  void Init();
+  int m_unk30;
+  int m_unk34;
 };
 
 #endif // MXSOUNDMANAGER_H
diff --git a/LEGO1/mxstreamer.h b/LEGO1/mxstreamer.h
index f8eeb43b..de84ed01 100644
--- a/LEGO1/mxstreamer.h
+++ b/LEGO1/mxstreamer.h
@@ -15,7 +15,7 @@ class MxStreamer : public MxCore
   __declspec(dllexport) long Close(const char *p);
 
   virtual long Notify(MxParam &p) override; // vtable+0x4
-  virtual MxResult VTable0x14() override; // vtable+0x14
+  virtual MxResult VTable0x14(); // vtable+0x14
 };
 
 #endif // MXSTREAMER_H
diff --git a/LEGO1/mxstringvariable.cpp b/LEGO1/mxstringvariable.cpp
index a9432679..e63329c1 100644
--- a/LEGO1/mxstringvariable.cpp
+++ b/LEGO1/mxstringvariable.cpp
@@ -1,14 +1,6 @@
-#include "MxStringVariable.h"
+#include "mxstringvariable.h"
 #include "mxstring.h"
 
-//FIXME: Figure out what exactly this class is used for. It is used in LegoGameState::LegoGameState when loading the background color, and for loading the "fsmovie" variable
-// OFFSET: LEGO1 0x1003bec0
-MxStringVariable::~MxStringVariable()
-{
-
-  delete &m_string;
-  delete &m_name;
-}
 
 // OFFSET: LEGO1 0x1003bea0
 MxString *MxStringVariable::GetString()
@@ -21,3 +13,10 @@ void MxStringVariable::SetString(const char *colorString)
 {
   m_string = colorString;
 }
+
+//FIXME: Figure out what exactly this class is used for. It is used in LegoGameState::LegoGameState when loading the background color, and for loading the "fsmovie" variable
+// OFFSET: LEGO1 0x1003bec0
+void MxStringVariable::Destroy()
+{
+  delete this;
+}
diff --git a/LEGO1/mxstringvariable.h b/LEGO1/mxstringvariable.h
index 5284fc5d..dd623dfb 100644
--- a/LEGO1/mxstringvariable.h
+++ b/LEGO1/mxstringvariable.h
@@ -10,7 +10,7 @@ class MxStringVariable
   MxStringVariable() {}
   virtual MxString *GetString();
   virtual void SetString(const char *colorString);
-  virtual ~MxStringVariable();
+  virtual void Destroy();
 
 protected:
   MxString m_name;
diff --git a/LEGO1/mxtimer.h b/LEGO1/mxtimer.h
index d79023d8..564eedfa 100644
--- a/LEGO1/mxtimer.h
+++ b/LEGO1/mxtimer.h
@@ -15,7 +15,7 @@ class MxTimer : public MxCore
 
   __declspec(dllexport) long GetRealTime();
 
-  long GetTime() inline
+  inline long GetTime()
   {
     if (this->m_isRunning)
       return s_LastTimeCalculated;
diff --git a/LEGO1/mxtransitionmanager.h b/LEGO1/mxtransitionmanager.h
index 3fdb1ebf..9dcb7f7c 100644
--- a/LEGO1/mxtransitionmanager.h
+++ b/LEGO1/mxtransitionmanager.h
@@ -9,7 +9,8 @@ class MxVideoPresenter;
 class MxTransitionManager : public MxCore
 {
 public:
-  virtual ~MxTransitionManager(); // vtable+0x0
+  MxTransitionManager();
+  virtual ~MxTransitionManager() override; // vtable+0x0
 
   __declspec(dllexport) void SetWaitIndicator(MxVideoPresenter *videoPresenter);
 
diff --git a/LEGO1/mxunknown100dc6b0.cpp b/LEGO1/mxunknown100dc6b0.cpp
index 029be1f7..b896fa10 100644
--- a/LEGO1/mxunknown100dc6b0.cpp
+++ b/LEGO1/mxunknown100dc6b0.cpp
@@ -6,6 +6,12 @@ MxUnknown100dc6b0::MxUnknown100dc6b0()
   Init();
 }
 
+// OFFSET: LEGO1 0x100b8560 STUB
+MxUnknown100dc6b0::~MxUnknown100dc6b0()
+{
+  // TODO
+}
+
 // OFFSET: LEGO1 0x100b85d0
 MxResult MxUnknown100dc6b0::Init()
 {
diff --git a/LEGO1/mxunknown100dc6b0.h b/LEGO1/mxunknown100dc6b0.h
index ca2ee600..29d42209 100644
--- a/LEGO1/mxunknown100dc6b0.h
+++ b/LEGO1/mxunknown100dc6b0.h
@@ -10,6 +10,7 @@ class MxUnknown100dc6b0 : public MxCore
 {
 public:
   MxUnknown100dc6b0();
+  virtual ~MxUnknown100dc6b0() override;
 
   MxResult Init();
 
diff --git a/LEGO1/mxunknown100dc6e0.cpp b/LEGO1/mxunknown100dc6e0.cpp
new file mode 100644
index 00000000..b896e89b
--- /dev/null
+++ b/LEGO1/mxunknown100dc6e0.cpp
@@ -0,0 +1,19 @@
+#include "mxunknown100dc6e0.h"
+
+// OFFSET: LEGO1 0x100b8d00
+MxUnknown100dc6e0::MxUnknown100dc6e0()
+{
+    Init();
+}
+
+// OFFSET: LEGO1 0x100b8d90 STUB
+MxUnknown100dc6e0::~MxUnknown100dc6e0()
+{
+  // TODO
+}
+
+// OFFSET: LEGO1 0x100b8df0
+void MxUnknown100dc6e0::Init()
+{
+  this->m_unk2c = 100;
+}
diff --git a/LEGO1/mxunknown100dc6e0.h b/LEGO1/mxunknown100dc6e0.h
new file mode 100644
index 00000000..79c63bab
--- /dev/null
+++ b/LEGO1/mxunknown100dc6e0.h
@@ -0,0 +1,19 @@
+#ifndef MXUNKNOWN100DC6E0_H
+#define MXUNKNOWN100DC6E0_H
+
+#include "mxunknown100dc6b0.h"
+
+// VTABLE 0x100dc6e0
+class MxUnknown100dc6e0 : public MxUnknown100dc6b0
+{
+public:
+  MxUnknown100dc6e0();
+  virtual ~MxUnknown100dc6e0() override;
+
+protected:
+  void Init();
+
+  int m_unk2c;
+};
+
+#endif // MXUNKNOWN100DC6E0_H
diff --git a/LEGO1/mxvideoparam.cpp b/LEGO1/mxvideoparam.cpp
index b72107c7..81f5d2d7 100644
--- a/LEGO1/mxvideoparam.cpp
+++ b/LEGO1/mxvideoparam.cpp
@@ -17,7 +17,7 @@ MxVideoParam::MxVideoParam()
 }
 
 // OFFSET: LEGO1 0x100beca0
-MxVideoParam::MxVideoParam(MxRect32 &p_rect, MxPalette *p_pal, unsigned long p_backBuffers, MxVideoParamFlags &p_flags)
+MxVideoParam::MxVideoParam(COMPAT_CONST MxRect32 &p_rect, MxPalette *p_pal, unsigned long p_backBuffers, COMPAT_CONST MxVideoParamFlags &p_flags)
 {
   this->m_rect.m_left = p_rect.m_left;
   this->m_rect.m_top = p_rect.m_top;
diff --git a/LEGO1/mxvideoparam.h b/LEGO1/mxvideoparam.h
index 3e00a920..0b6b2a38 100644
--- a/LEGO1/mxvideoparam.h
+++ b/LEGO1/mxvideoparam.h
@@ -3,6 +3,7 @@
 
 #include <ddraw.h>
 
+#include "compat.h"
 #include "mxpalette.h"
 #include "mxrect32.h"
 #include "mxtypes.h"
@@ -14,7 +15,7 @@ class MxVideoParam
 public:
   __declspec(dllexport) MxVideoParam();
   __declspec(dllexport) MxVideoParam(MxVideoParam &);
-  __declspec(dllexport) MxVideoParam(MxRect32 &rect, MxPalette *pal, unsigned long p3, MxVideoParamFlags &flags);
+  __declspec(dllexport) MxVideoParam(COMPAT_CONST MxRect32 &rect, MxPalette *pal, unsigned long p3, COMPAT_CONST MxVideoParamFlags &flags);
   __declspec(dllexport) MxVideoParam &operator=(const MxVideoParam &);
   __declspec(dllexport) ~MxVideoParam();