Some feedback:
- The player gets stuck on walls if you move into them.
- The lava/acid colliders were bigger than they appeared
- The levels seemed to be variations on each other. It's okay to have small repeated parts, but it's much more fun if the layouts are different each level.
- You should upload a web build to itch (make sure to set compression to Gzip in build settings) so that more people will play and rate it
However, the art was nice and I liked that you used some post-processing to make it more enjoyable. I think you could have done more playtesting and polish before submitting. Nontheless, well done for getting the game out on time and I hope you'll keep working on it!