Seems actively antagonistic to the player. (Not just the precision timing; the delay in emerging from a purple teleport with a jump immediately after it, for example. Or whatever the [expletive] level 5 is, where I made it into the second chimney but on top of everything else, jumping at the right time doesn't even always get you onto the next platform.) I've been enjoying the releases and I kind of wanted to see what was going on here, but not badly enough.
Also the spacebar isn't working for jumping.
EDIT: against my better judgment, I right-clicked to open the frame in a new tab; the spacebar worked there. Against my better judgment, I kept playing. Ended six stars short, but I doubt I'll be returning to it, somehow...