Ok, here's are the points:

1. Increase the player's jump distance because it's ridiculous how small the distance is the player covers while jumping.
2. The parallax background is nice but make sure to improve the artstyle.
3. sometimes the procedural generation generates comically spacious areas where jumping through them is totally ridiculous.

if you worked with lesser time and submitted late, I understand. but next time make sure to make a better game with the advice I gave you.