Really cool game! The art is so unique and different from other games, I really like it! The gameplay is also nice, you have to manage all kinds of systems at once, which makes it a bit chaotic. Finally, the sound effect of moving the gun is really funny XD It fits the game very well though!
The only complaint I have is that the controls needed to be a bit more intuitive. I read the text on the games itch page, but this did not really help me understand what to do either. Eventually I figured it out by just trying things, but a bit more intuitive labels/art would be have been good (in my opinion). For example, the big red button with the skull next to it is completely clear. But when the battery was empty and the screen went black I had no idea what to do (I even quit and restart the game because it was the only way I knew to restart). Perhaps some arrow that points towards where I can get a new battery would help (I figured it out in the end though).
Hopefully you don't mind the criticism too much. I really enjoyed the game and I think it is really cute! I completely agree with @Felix T. Vogel that I would love more levels if you decide to continue working on this! :D And even though you did not manage to do it in three hours, I still think it is impressive that you all were able to create this in such a short amount of time. Great job!