Below is my feedback. I submitted too.
- Visuals: Excellent use of the Pixel Industrial pack! Your map and UI are consistent
- Level Design: Your level designs are easy to flow through and understand. Though I'd soften the gap on the 1st level for the sake of better ease of play.
- Mechanics: The jumping works. But you may need to study timed platformers like Mind of Magnet for example. Your platform/jumping needs breathing room; I have to be pixel perfect or overshoot to land the jumps as times. Mario games usually have some breathing room built-in when off my a few pixels.
- Performance: On the 2nd level, the game slows down and frame rate gets jittery. Perhaps optimize some scripts.