This game is very trial-and-error heavy since you have to remember the exact path the player took on the previous run. And that's on top of having to remember where you placed all your platforms. The main feature I would add is a line-trace that shows what your trajectory was on your previous jump. It got to the point where I was taking screenshots of the game just to remember everything.
The level that introduces jump pads was especially guesswork-heavy. There is really no way to judge where to place the platform since being even slightly off will cause you to not hit the jump pad dead on. I just had to try different heights until it worked.
But that aside, there were some fun levels in here. The last level required very clever problem-solving to get around all the obstacles. Nice work!