Fun to play but a lot of the art assets clash with each other such as how some enemies are more pixelated and larger than everything else. Additionally, some weapons spawn bullets a good distance away from their barrel, and bullets don't fit their weapon (i.e. spawning mouse clickers). Having a consistent art style can go a long way in defining a game's identity. You have a good start and it can turn into something great with more work, so keep it up!