I couldn't get past the level with 3 others in it... I think I needed to move really fast or something so I could get past the unjumpable set of spikes while someone else was still there to take the damage for them, but I couldn't seem to accomplish that. (And that hitbox for the spikes to the side kept making me sad as I misjudged it over and over XD ) With that said, it was a very interesting joined together implementation. I don't think I've seen anything else like that specifically. Great job and nice animation ^_^ Cheers!