nice game! it's pretty fun for what it is, but i think you should be able to change which direction you're going to charge in while holding down any of the arrow keys. right now, if i hold the left arrow key and then push down the right arrow key and let go out of the left arrow key, i'll charge to the left. i feel like that should change my direction so i can charge to the right. besides that, i like this!
hold arrows to charge and smash enemies (recharges ammo)
z to fire