Code:
I can press Alt+Tab to see the other apps running
So it isn't crashing or hanging. Most likely it is changing the display mode and not restoring it when it exits. What you can try is instead of running your game as:
run a bash script instead which contains:
Code:
#!/bin/bash
wine game.exe
xrandr -s 0
this should set your screen mode back to the default when the game exits.