That thing at the end is so troll XD I got ran over when I first saw it. The pixel art was really good and I liked the weapon swap mechanic too.
Some feedback though is maybe not allow the weapon to swap to itself, and remove the reload between swaps. I think it'd also be more enjoyable if the starting pistol wasn't weak since it feels bad whenever you swap to it.
Despite no story, I think I understand the situation given the setting and monsters. I think this was really sweet and the robot is kind of cute x3