This game has a really solid concept and I like it a lot. However, I have a couple of things to point out that may help improve. First some more sound effects such as a sound for charging and shooting would be really nice. Aswell as making the game start off a lot easier and then maybe if you beat a level the game gets more and more difficult. overall the art, theming and everything about the game is really solid and I like it I just feel that things need little improvements. Also the aiming bar for you direction in the game seems sort of misaligned.