Alright, some critiques;
The jump pad is janky as hell; Idk if you were trying to go for "timed jump" where you're supposed jump as it moves up, but it feels pretty bad to use. And visually it's very jarring as it misaligns your jump spacing when going up. In fact, the ground pound jump almost gives you almost as good a boost and is more consistent overall.
There HAS to be some sounds in the game, especially for the disappearing platforms. There's basically no cue or indication when they'll disappear, and not having some rhythmic feedback such as sound makes it hard to plan your jumps right.