My favorite entry I've played so far! Really excellent work guys!
Platforming hitboxes should be reduced in size to make it a tad easier, though the levels that were there were great (and thank goodness for checkpoints!)
The platform speed compared to the player speed felt off somehow. At least on a few of them (they were really really fast)
DDR: Loved this, took me right back. An animation or something juicy would have been nice to indicate to me (in a super obvious way) that I hit the keys correctly at the right time, I wasn't always sure when I wasn't looking at the fill meter.
Bullet hell: This was really fun. Those bullets that curve got me everytime!!