Surprisingly glitchy. Between falling though the ground every now and then and sometimes being literally unable to make the first jump despite grinding as much as possible and getting a perfect jump, I don't know what to think. It's definitely fun when it works, but it's a bit too unreliable.
Not having visible boundaries made the jumps from "platform" to "platform" frustrating. To make it over the fire I had to go just past the m and stand on thin air when I jumped.