Art is so good, like the puddle effect as you walk, and the fluffy clouds. the enemies explosion effect, only critique is the grey background doesnt seem to fit well with the rest of the art. Gameplay was alright, I like how you can make your own difficulty, it does fit the limitation even though the spawned enemies seem the more obvious enemies. I was clicking the upgrades randomly though, don't really have time to read when there are a ton of enemies to shoot.