Thank you so so much for your detailed suggestion!
There are many things mention here that is actually on this project’s to-do list like adding sounds, death animation, fan wind’s particles, and even more stuffs like the last 5 levels to make the level count reach 30 (include a final boss fight)… But because I’m extremely busy during the game jam, I have to cut many corners.
I will make a post-jam update that include your and others suggestions.