I love the gameplay! Good level design and mechanics. You made simple art attractive too. I appreciate you thought of making a slower difficulty option, as well as allowing players to deselect a selected object, since those are things a lot of rushed games could neglect.
The badguys don't look evil enough. The evil eyes are too small to notice except on zoomed in screenshots. I didn't realize they were enemies until one killed me. I figured since they look like me (except for color) they're more likely friendly. Maybe give them an angry scowl, since an evil smile looks too much like a friendly smile at this size.