I liked the art and the idea, but I didn’t fully understand what I was supposed to do. There was no guide on how to play, and I didn’t discover that I could shoot with Z until later. I also didn’t know what I was supposed to do in the first mission.
That said, it was really fun to play, and I loved the little astronauts, haha! Just add a simple guide explaining the controls and objectives, and it would be much better. Great job!