The mechanic has some potential, although you should try making smaller levels with clever design (avoiding extremely precise jumps like the first long jump in level 1, they make falling kinda frustrating for the amount of progress you lose). I also suggest you to cut some details from the background since it is too polluted compared to the rest of the art. Nice entry overall!
Viewing post in Forced Partners (GMTK Jam 2021) jam comments
About the first long jump: I never really bothered to take it out because there was an easy skip probably nobody noticed^^'
About the background: Yeah, I didn't really get that to look as I wanted. What really bothers me tho is that it turned out so dark, I had to make the characters lit up to pop out, destroying the original character design^^'
And finally, about your first point, potential: I really liked the base idea I had so I plan on working it out to a full game later on!