weird, you should be able to move with arrow keys, does the enemy moves?
Yes, enemy moves and also shoots at me sometimes, but it only hit me once. Arrow keys did nothing sadly... Could it be maybe keyboard layout? I'm on german keyboard layout but I'm not aware that arrow keys are different...
There's a bug that freeze the player when hit while not on border, if that's the case the only thing you can do is reseting the stage (press R).
I'm going to upload a fix soon.