I have an issue with the game running in fullscreen. When I first launched the game, it worked perfectly fine, but I alt tabbed to set the 16 bit color mode. And now whenever I try to play in fullscreen (alt+enter) the screen just freezes. The game itself doesn't freeze, it is running in the background, but the screen is frozen at the last frame before alt entering. Now whenever I launch the game, if it is set to fullscreen, the screen is completely black.

Is there a fix for this? Or do I have to play in windowed mode now?