Needs quite a bit of improvement, but not too bad. Use the mouse to aim. Or WASD. Please, just dont use the arrow keys unless they are the action buttons, wasd is so much more control and user friendly than up down left and right are.
Add more items, and something more effective to counteract the reflection and annoying out of your sight movements. Then maybe pop in some more backgrounds, give the enemies actual movements instead of wobbles.. and viola youll have a nice game. Wish you best of luck with what you decide to do.