A bit unforgiving with the jumps being decided by your momentum, even the smallest momentum. But giving some visual indicator that your moving instead of changing the mechanics themselves might be the best fix to make it less frustrating for the less patient.
After all, most games arn't frustrating when you know how it works, making sure the learning is fun should really be a goal with instructionless games, to keep the player's "momentum"(unless of course you want more of an 'ah ha!' kind of discovery from the player, but those might be better for supporting mechanics)
I DID see that you put some marks in the background to clue-in and guide the player to these tricks, I'm just putting up another way you could re-enforce it.
also, check the gallery, I cooked somethin' up for ya