The squids, yeah, haha! I bumped their damage a bit very close to the end of the jam, and never got around to really testing them again. So they may be a bit overtuned!
Good idea with the 1x10 card. It could even do only the micro-staggers and no damage, but go fast enough to stunlock enemies, which would help to differentiate it from the other two damage cards as well!
The rewind while you're dying was not intentional, but I did discover it at some point and thought, eh, I can probably just leave it in. It does give a bit of push your luck feeling, and the game isn't too easy, so a bit of rule bending for the player seems fine. Happy it landed well with you!
Thanks so much for the feedback and kind words!