I completed the game in casual mode, could not get past the wave 3-2 in hardcore so far.
What's reassuring me is that I can't manage to assimilate the color change controls more when I play this game or the other game from the jam which also use 3 colors better than when I'm playing our own game. We should have synchronized so we all use the same color code ;) although I'm not sure it would have helped, I think I'll just never be good at that.
The game is fun, controls are good, you've really got plenty of very beautiful bullet patterns in the game and the speeds of the character and bullets feels right, difficulty is right on point.
It's also super cool that you added a colorblind mode.
Nice work, thanks for sharing.