Hey, I really like this game! Nice job. I have some more detailed feedback for you here:
Design [4/5]: The platforming feels fun to play around with, and I like the different ideas you explored with moving platforms and killzones on the edges of moving platforms. The biggest issue I have with this game is the fact that it's score based rather than level based. I wish that there were different levels that were focused on one concept or idea at a time (or, perhaps checkpoints rather than a high score system). The one level you have is generally well designed, and I enjoy all the different concepts you explored with it. However, it's frustrating that dying brings you all the way back to the beginning. You can get really high up in the level only to be brought all the way back to the beginning to do that same beginning section that you've already done so many times. In other words: the better you are at this game, the more harshly you are punished for making a single mistake, which feels backwards to me. One other minor nitpick I have about the scoring system: your score goes down when you go down. I feel like your score should be the highest point that you reached on your current life, not the elevation that you are currently at.
Adherence to the Theme [5/5]: It's a platformer that uses only one button. Nicely done!
Originality [5/5]: I've seen games focused on wall jumping before, but I've never seen one where your only movement option is wall jumping. It's a cool idea!
I think that with some more focused and less punishing level design, some art, and some sound effects, this could make a neat little game. Keep up the good work!