Those are some great visuals! But I have to say, I didn't like the sound effects and they got really annoying. Gameplay-wise I think you have to explain your game better to the player. It took a moment for me to get the rules and I'm still not sure, if I really understood the mechanics, as in you can just walk by the first guard. Also the level exit could be a little bit more clear - after collecting the gems I didn't know where to go. And the exit button in the menu didn't seem to work.