I really liked the art style, especially the little melee enemies and the sound effect when they all start stampeding toward you! I think this mechanic would fit really well in a rogue-like bullet hell type of game, I feel like random weapons are already a staple of the genre and the ability to randomize the player and enemies is really interesting. It also adds an interesting decision of whether it's worth the risk to randomize if there's melee/ranged/boss enemies ahead. For example, having slow bullets + big bullets + fast fire rate felt like totally different gameplay and made it super easy to create a wall of bullets to defeat the melee guys, while the ranged enemies were much more dangerous.
I personally would also add the player's current speed to the bullets when you instantiate them, it's a bit more physically intuitive and I find that it makes it easier to aim correctly while strafing. Nice job!