Skull mode make a great and innovative gameplay feature (additionally to looking funny)! Very nice idea!
The jumping didn't feel quite right for me and could use a bit improvement in my opinion. But the hilarious death animation made up for it every time i jumped into the spikes 😂 (Fun fact, had a pretty similar idea for the death animation in my game Bone Runner for another game jam a few months ago).
Congrats to this nice entry! :)