This concept is seriously solid.
With a bit of extra polish and better balance, this could turn into an absolute banger of a game—the potential here is enormous.
In its current state, randomness plays a pretty heavy role in determining whether a run succeeds. Preventing spawns at the screen edges could help even things out. A “loop pillar” upgrade—maybe every 10 loops or so—that allows players to customize the loop further could really enhance the experience.
Also, heads up: if you play long enough, the music just gives up and stops 😅
Still… the idea is so good, I might just “borrow” it one day 😉