There is a lot of content here! All kinds of weapons, enemies and room types! The gaemplay is really nice too. All ranged weapons feel distinctly different (albeit that some are a bit overpower, I am looking at you laserbeam), and everytime I found a weapon I had not used yet I was curious what it would do. I must say that I did not fully understand how the melee weapons were different from each other. I guess just the amount of damage?
One criticism I have is that it gets a bit repetitive after a while. Maybe if you introduced new enemies as you played that would have kept the game a bit more interesting for a longer amount of time. Another is that there is not a lot of incentive to stay and fight the monsters, especially if you just cleared out a room with the exact same enemies.
Criticisms aside I really enjoyed playing! It felt unique, responsive, the art and music were nice, and the variety of weapons was really cool. Great job!