Great Game ! It's really a catching game, and the retro visuals is nostalgic. Very well exectuted, my favorite so far.
One thing: F5 closes the game which I pressed to get back to fullscreen (Saving game, pressing escape, game goes back to embedded screen), F5 is next to F4 so I exited the game by accident a few times without knowing what happened (crash?). After the third time I realized F5 closes the game.