The text that tells you what keys to press are:
1) Small
2) Not in the easiest to read font
3) In a color that doesn't stand out from the background
There are also some keys that show up as empty, and they're not space, as that has the term "space", so I couldn't figure out what key it was.
The points where the controls switched felt random, the first set of keys lasted me like 30 seconds, then I had fairly rapidly switching controls. every 5-10 seconds.
Game felt pretty good when I have figured out which keys to use, for that moment the gameplay, the platforming feels fine, but I agree with many of the other commentors here that some form of warning/notification needs to occur before/when the keys switch.