I like the idea pretty much! I can see what your vision was for this game. Somehow the only thing I missed was the visuals and some kind of tutorials for beginners, because even after beating some levels I still hadn't really figured out how the player actually can be controlled. After some levels it still felt like I just have had luck instead of skill while beating it.
My respect goes to the fact, that you even managed to pull of like an overworld with a level selection! I take my hat :-)