I agree with Player609, a couple of comments below this. Cursed my ambition for the 60pts badge that makes me play that "bonus" campaigns! (which are a limited version of the long, boring main campaign with a fancy name, like a remasterization of Boredom). I would rather say that Prometheus finds more joy with his eagle affair.
I really didn´t like the "hold jump to set height" feature. Combined with the double jump it felt unnatural and imprecise, and as the difficulty raises you do need that precision.
If you have trouble with the "reach boost" achievements, use farty pants. Right at the start of the race, without even accelerating, jump and do forward somersaults until you reach the desired boost. From boost one, you can even do double forward somersaults.
Haha I know what you mean :)