Hey thanks a lot for the feedback! Happy to hear these :)
Yeah started the jam 24 hours late, didn't have time for checkpoints - proper level design (each enemy type nicely introduced one by one along with various mixes of each) and proper game feel (better shatter FX + sound FX + people shattering to pieces etc.) - Combos & Fever mode.
Hope to finish this as a online 2 player multiplayer (each person controlling one person) + single player, if this gets to top 20 :)