° The Red X that shows you where you can't move shows up a little too slowly for my liking, but that's just a minor nitpick.
° It's also a bit annoying when you die or get checkmated because you can't see behind the level blocks, and the enemies trap you on that turn, then kill you the next. Though, this is also minor.
• Pushable objects?
• An enemy that takes up 2 spaces?
• An enemy that shoots a projectile?
• An enemy that stands still and tries to run away if the player gets too close?
• Picking up food while already at the maximum food count turns the excess food into a projectile?
• Conveyor belts?
• Water to work in the same way as food, but obtained through a different manner?
Thank you for taking a gander at my dumb ideas, and I really love this game.