I love the concept, seeing an achievement system, speedrunner reactions and upgrade system were surprises for me and they really elevate the game, make it more fun and replayable.
The controls were a bit funky. It seems like I could wall jump but there is such a tiny window and it's not necessary to complete any of the levels... Also landing on an edge of a platform means your character can roll down, which feels exactly as the reaction of a mushroom speedrunner guy:)
Still, I really enjoyed playing the game! It puts a great spin on a familiar genre.