Yeah fair, was prob rushing it a bit to get it in for the challenge! I'll give it some polish - ta

It's 40 frames, not 34 xP

There are some frames where the skull appears to be auto-scaled up, those could use some clean-up. The animation of the torso also seems unfinished. Even if you're going for a deliberately sketchy feel, I think you can avoid having outright scribbly lines. Minor inconsistencies from frame to frame create that rough look, so you could do it even with polished pixel art.