Really cool! Like the idea that the platform is connected to you. That was used pretty well, especially with the power ups, and I think it could be expanded upon greatly if you wanted! Liked the art and music as well - all well done!
Couple things. I like the boost jump mechanic, but the problem is that after it was introduced, it felt like most of the jumps required its use, which started to feel a little tedious, especially since it's slightly awkward to do (have to press up and down at the same time, rather than being able to switch off between the two in a given time frame, for example). For the long jump, I wish there was a little more feedback. For the vertical boost jump, you knew you did it successfully because there was a sound effect, but for the long jump, it sounded the same as a normal jump. Because of that, I wasn't sure if I was successfully doing it the first couple of times, which threw me off a little.
That said, I think this is an overall really good game with some good ideas, good visuals, good music, and it makes for a good time. Great work!