Well, whaddaya know, this does look like it was made by 20 people, haha! Very well polished and full of interesting ideas. Different weapons feel noticeably different, upgrades are simple but make sense, boss attacks are reasonably well telegraphed and understandable (although I don't think I could have beaten this if the rapid swing didn't bounce bullets lol).
I did have a lot of trouble with the controls, however. Not in understanding them, but in actually using them effectively. The movement and momentum idea is cool in theory, but it gets quite tiresome during the actual fights, and especially for the Hammer, it feels like it's too easy to get the hammer pointing in the opposite direction of the mouse (because the momentum is so slow), and it takes ages to course-correct and start swinging again, during which you're super vulnerable to the bullets.
If you have time, please consider trying out our game too ^^