There's a LOT of personality in this game and I really enjoyed that. I love the newgrounds-y art style and the game's pretty funny too (that name is probably the best in the whole jam). The bosses were very well-designed and attacks definitely felt like they complemented each other which is something I absolutely love to see. The only criticism I have is that I saw that bullets could have different textures, but I didn't really see those different textures actually changing anything about the bullet, or if they did I didn't really notice it.
Thanks!
Regarding bullet types- different types deal different amount of damage. Damage, as well as other bullet properties are linked to number of bullets you get- your get more if the value is closer to average, so that you don't get stuck with crappy bullets, or just rip through a boss, because you got good ones. I guess the differences in damage output aren't too dramatic (the best ones have little more than twice the damage of the weakest), so it may be hard to notice.
That's totally fair. If you plan on making a post-jam version, I'd definitely recommend going beyond the scope of just "damage" as far as the textures go. For example, the fire texture could have DoT or the ice texture could make the boss attack slower, stuff like that. It'd definitely improve the game if the different bullet types actually did totally different things, though this is 100% just a minor nitpick rather than an actual major criticism of the game.