Played for about 10 minutes. I reached the part after the first red platform, but I couldn't for the life of me bring the stars down the platform to the metal pipe, so I gave up there.

That's a novelty idea I don't remember seeing elsewhere. I liked the puzzle aspect of the gameplay, how you move the stairs around to bring yourself up and get the stairs again to cross the next platform. When I started the game (without reading the instructions) I honestly had no idea what to do, until I read the controls, got the stairs and had a really nice "a-ha!" moment.

The mechanic really does need some polishing though, if you ever with to keep developing the game. Maybe it was the "CTRL+D" problem you mentioned (I was playing full screen, but there was a popup flash on the top-left corner of my screen everytime I spined the stairs), but sometimes the control simply would "stuck" in a movement (e.g. the stair would keep spinning, the player would keep walking) even after I released the input. The stairs collider also didn't exactly felt intuitive; sometimes it would start sliding out of a platform, sometimes it would simply fall. The game would benefit greatly with more precise inputs and colliders for the platforms and the stair. I'd honestly give at least 4 stars on gameplay  for the novelty mechanic aspect, if there weren't any issues that affected gameplay so much.

Besides that, the game didn't particularly screamed the "Momentum" theme to me, and not "Foddian" either.  Every time I fell, I had to start over because the stairs would be in a position I couldn't reach anymore - so it wasn't like I was "losing progress", it was more like a "Game Over" feeling to me every time that I fell away.

Btw (saying this because I read the description of the game!) don't feel discouraged because the game is buggy. You actually finished a game, so congrats! It's a jam, shit happens. As long as you had fun in the process, finishing a game is always something to celebrate.