Those white particles come out of spikes that are on the ground and have a small hitbox, the actual particles are making hard to see them (the opposite purpose of why i have them there), i will make them a lot more visible when i change the global light and add them a small glow (and probably delete that particle effect).
About the platforms i was going for making them reappear, but i got scared by the jam time and did the function only delete the object.
I will work on a dead feedback, at least a sound and a transition.
The music glitch i don't really know what is making that happen, i believe i have null musical skills so i will ask a friend to help me with that.