Looks and sounds great and I appreciate the inclusion of an audio settings menu! Space bar felt a little bit clunky to me as the shoot action, might have been nice to include Left Mouse as well or something. Definitely a challenging game. Nice job!
That's a great idea! Funny story - my keyboard won't let me press Up, Left, and Space bar at the same time. So I also allowed the Control key as well. Mouse would've been nicer I think.