WAIT STOP HOLD ON
I'll admit i liked the game a lot, it was really fun, but since when can the king not attack when he's in checkmate with a queen? i could understand if there was something protecting the queen but i do not recall there being anything.
If it helps my king was in the right hand corner with just a pawn in front of him, i will admit this may be my eyes deceiving me, or it might be a bug in ur game either way good job.