diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index f07a7d26..3e98bafd 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -32,8 +32,7 @@ jobs:
         C:\msys64\usr\bin\wget.exe https://archive.org/download/idx5sdk/idx5sdk.exe
         7z x .\idx5sdk.exe
         7z x .\DX5SDK.EXE
-        cd cdrom
-        
+
     - name: Cache DX5 SDK
       if: steps.cache-dx5.outputs.cache-hit != 'true'
       id: save-dx5
@@ -41,13 +40,13 @@ jobs:
       with:
         path: dx5sdk
         key: dx5sdk
-        
+
     - name: Setup DX5 SDK
       run: |
         cd dx5sdk
         cd cdrom
         .\SETUP.EXE /s
-        
+
     - name: Build
       shell: cmd
       run: |
diff --git a/ISLE/isle.cpp b/ISLE/isle.cpp
index b2ab17a9..d3bd8f3d 100644
--- a/ISLE/isle.cpp
+++ b/ISLE/isle.cpp
@@ -254,7 +254,7 @@ void Isle::setupVideoFlags(BOOL fullScreen, BOOL flipSurfaces, BOOL backBuffers,
 BOOL Isle::setupLegoOmni()
 {
   char mediaPath[256];
-  GetProfileStringA("LEGO Island", "MediaPath", "", mediaPath, 256);
+  GetProfileStringA("LEGO Island", "MediaPath", "", mediaPath, sizeof(mediaPath));
 
   if (Lego()->Create(MxOmniCreateParam(mediaPath, (struct HWND__ *) m_windowHandle, m_videoParam, MxOmniCreateFlags())) != FAILURE) {
     VariableTable()->SetVariable("ACTOR_01", "");
@@ -348,13 +348,13 @@ LRESULT WINAPI WndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
     }
     return DefWindowProcA(hWnd,WM_SYSCOMMAND,wParam,lParam);
   case WM_EXITMENULOOP:
-    return DefWindowProcA(hWnd,WM_EXITMENULOOP,wParam,lParam);
+    return DefWindowProcA(hWnd, WM_EXITMENULOOP, wParam, lParam);
   case WM_MOVING:
     if (g_isle && g_isle->m_fullScreen) {
       GetWindowRect(hWnd, (LPRECT) lParam);
       return 0;
     }
-    return DefWindowProcA(hWnd,WM_MOVING,wParam,lParam);
+    return DefWindowProcA(hWnd, WM_MOVING, wParam, lParam);
   case WM_NCPAINT:
     if (g_isle && g_isle->m_fullScreen) {
       return 0;
@@ -396,8 +396,10 @@ LRESULT WINAPI WndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
 
     switch (uMsg) {
     case WM_KEYDOWN:
-      if (lParam & 0x40000000) {
-        return DefWindowProcA(hWnd,WM_KEYDOWN,wParam,lParam);
+      // While this probably should be (HIWORD(lParam) & KF_REPEAT), this seems
+      // to be what the assembly is actually doing
+      if (lParam & (KF_REPEAT << 16)) {
+        return DefWindowProcA(hWnd, WM_KEYDOWN, wParam, lParam);
       }
       keyCode = wParam;
       type = KEYDOWN;
@@ -603,7 +605,7 @@ void Isle::tick(BOOL sleepIfNotNextFrame)
           return;
         }
 
-        ds.m_atomId = stream->atom;
+        ds.setAtomId(stream->atom);
         ds.m_unk24 = 0xFFFF;
         ds.m_unk1c = 0;
         VideoManager()->EnableFullScreenMovie(TRUE, TRUE);
@@ -612,7 +614,7 @@ void Isle::tick(BOOL sleepIfNotNextFrame)
           return;
         }
       } else {
-        ds.m_atomId = stream->atom;
+        ds.setAtomId(stream->atom);
         ds.m_unk24 = 0xFFFF;
         ds.m_unk1c = 0;
         if (Start(&ds) != SUCCESS) {
diff --git a/ISLE/isle.h b/ISLE/isle.h
index e23fb8cb..389e8630 100644
--- a/ISLE/isle.h
+++ b/ISLE/isle.h
@@ -1,7 +1,7 @@
 #ifndef ISLE_H
 #define ISLE_H
 
-#include <Windows.h>
+#include <windows.h>
 
 #include "mxresult.h"
 #include "mxvideoparam.h"
diff --git a/ISLE/main.cpp b/ISLE/main.cpp
index c4e9f4f3..651bfffc 100644
--- a/ISLE/main.cpp
+++ b/ISLE/main.cpp
@@ -1,5 +1,5 @@
-#include <DSOUND.H>
-#include <Windows.h>
+#include <dsound.h>
+#include <windows.h>
 
 #include "define.h"
 #include "isle.h"
@@ -21,7 +21,7 @@ BOOL findExistingInstance(void)
 // OFFSET: ISLE 0x401ce0
 BOOL startDirectSound(void)
 {
-  LPDIRECTSOUND lpDS = 0;
+  LPDIRECTSOUND lpDS = NULL;
   HRESULT ret = DirectSoundCreate(NULL, &lpDS, NULL);
   if (ret == DS_OK && lpDS != NULL) {
     lpDS->Release();
@@ -52,7 +52,7 @@ int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine
   // Throw error if sound unavailable
   if (!soundReady) {
     MessageBoxA(NULL, "\"LEGO\xAE Island\" is not detecting a DirectSound compatible sound card.  Please quit all other applications and try again.",
-      "Lego Island Error",0);
+      "Lego Island Error", MB_OK);
     return 0;
   }
 
@@ -61,7 +61,7 @@ int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine
 
   // Create window
   if (g_isle->setupWindow(hInstance) != SUCCESS) {
-    MessageBoxA(NULL, "\"LEGO\xAE Island\" failed to start.  Please quit all other applications and try again.", "LEGO\xAE Island Error",0);
+    MessageBoxA(NULL, "\"LEGO\xAE Island\" failed to start.  Please quit all other applications and try again.", "LEGO\xAE Island Error", MB_OK);
     return 0;
   }
 
diff --git a/ISLE/res/isle.rc b/ISLE/res/isle.rc
index 59bd314b..4534ea64 100644
Binary files a/ISLE/res/isle.rc and b/ISLE/res/isle.rc differ
diff --git a/LEGO1/dllmain.cpp b/LEGO1/dllmain.cpp
index 53650bd6..58d0149f 100644
--- a/LEGO1/dllmain.cpp
+++ b/LEGO1/dllmain.cpp
@@ -1,4 +1,4 @@
-#include <Windows.h>
+#include <windows.h>
 
 // OFFSET: LEGO1 0x10091ee0
 BOOL WINAPI DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved)
diff --git a/LEGO1/mxatomid.h b/LEGO1/mxatomid.h
index 3e3ce24b..537b097e 100644
--- a/LEGO1/mxatomid.h
+++ b/LEGO1/mxatomid.h
@@ -1,7 +1,9 @@
 #ifndef MXATOMID_H
 #define MXATOMID_H
 
-enum LookupMode;
+enum LookupMode
+{
+};
 
 class MxAtomId
 {
diff --git a/LEGO1/mxcriticalsection.h b/LEGO1/mxcriticalsection.h
index bd84babb..81d96d37 100644
--- a/LEGO1/mxcriticalsection.h
+++ b/LEGO1/mxcriticalsection.h
@@ -1,7 +1,7 @@
 #ifndef MXCRITICALSECTION_H
 #define MXCRITICALSECTION_H
 
-#include <Windows.h>
+#include <windows.h>
 
 class MxCriticalSection
 {
diff --git a/LEGO1/mxdsaction.h b/LEGO1/mxdsaction.h
index d76f6930..aa5a7e4b 100644
--- a/LEGO1/mxdsaction.h
+++ b/LEGO1/mxdsaction.h
@@ -47,6 +47,11 @@ class MxDSAction
   int m_unk8c;
   int m_unk90;
 
+  void setAtomId(MxAtomId &atomId)
+  {
+    this->m_atomId = atomId;
+  }
+
 };
 
 #endif // MXDSACTION_H
diff --git a/LEGO1/mxomnicreateparam.h b/LEGO1/mxomnicreateparam.h
index d0439e26..31dcd447 100644
--- a/LEGO1/mxomnicreateparam.h
+++ b/LEGO1/mxomnicreateparam.h
@@ -1,7 +1,7 @@
 #ifndef MXOMNICREATEPARAM_H
 #define MXOMNICREATEPARAM_H
 
-#include <Windows.h>
+#include <windows.h>
 
 #include "mxomnicreateflags.h"
 #include "mxomnicreateparambase.h"