Very pretty pixel art style and fun gameplay. Being a chess lover myself I enjoy placing down my pawns and predicting how they would move when I hit start although some of the levels requires more of a trial and error approach.
There is a bug I encountered where the level select button is hidden behind a banner that didn't go away for some reason (see screenshot). And the sound effect of the colonel talking is quite loud and awful.
Other than that, this is a very enjoyable game. Good work on the submission!