yep, wanted to add exactly these things (various speeds, more audio, fixing jump cheat, possibly speeding up with levels and making speedup/slowdown "booster" work, etc) too but in 1 day it was impossible to do it bugless and if i make bugs it's mostly making things literally unusable and then i'm fighting days if not weeks to fix such so i decided to not do it.
thanks for comment, wanted to also add different audio for each level but also time didn't allowed :)
like if i started it earlier and got that idea earlier it'd possibly be in game but like… started doing too late…