Thank you for your feedback and for playing my game !
Since it's my first gamejam I was a bit in a rush, and I agree that some aspects are not explained that much (definitly something I wanted to add).
I also agree that the first run doesn't have a lot of time : I wanted to have the sensation of urgency but with so little time it's hard to even get into the game during the first run.
And reseting all trash might be better and easier for the player to understand instead of explaining a trash reset concept : it's definitly something that I will focus on.