Hmm.. Does it use any calls that might not be obvious API calls or anything? For example, I just got my game running in Linux, but due to a font issue, I learned from F0 that font functions have an API call in windows that sometimes glitches your game if you're not running in Windows... So it could be something as simple as that. Does your game have custom fonts or anything at all like that? It could be that Neko doesn't like a particular call that seems otherwise benign in the game..