Honestly one of the best games i've played here. You should definetly continue this game and actually finish it, because the idea is great, art for the player and enemies, music are all great, and physics are done really nice. It really just needs polishing and some bugfixing. Also some might disagree, but i feel like the camera can be a bit more zoomed in, and the insides of structures can have some variety.
But yeah, good game, and it has a lot of potential.