Wow, that was awesome!
I was initially a bit perplexed by what this game would be, especially when I just spawned in and didn't exactly know what I would be doing. But once I started to see how the bullets began to stack upon eachother it hit me with such a good feeling of "Oh, this is awesome."
I like how this game plays very back and forth on the "Wow, I am getting hit by everything" to immediately being "Wow, I cant get hit by anything" and that kind of realization is nice to see knowing that you've been on both sides of them.
It's also fun knowing that you can theoretically control where every new bullet is going to be, so there is some level of planning how they get added, but I found myself not really planning much after it got crazy enough. It would be interesting to see how this plays if the player had to think more about how the next layer of bullets would be added. Then they would think about how it would react with the other layers.
It is also so cool that after awhile you can start to see the patterns the bullets move in, and dodging them you can basically find a consistent path you can track since they will keep repeating themselves. Although, I did find myself sometimes just barging through since they didn't deal that much damage, but I think that is a good thing rather than this game being extremely hard to dodge everything. I like that you made the smaller projectiles deal less damage as you went, because dodging all of those would be probably impossible.
Switching between the two types of gameplay is also nice, since having the moment of "okay, now get hit as much as possible" is a good break in between the hectic normal gameplay.
I'm not sure how this game could be expanded out post jam, but I think there is a cool idea here. Maybe with some flexing of the core design of the game itself.
This was awesome! And a very creative take on the theme. Nice job!