I play on web too, so I couldn’t say. I am on level 509, and my chief complaint is actually that the difficulty does not seem to scale up beyond level 100 or so. I wonder if they’ve adjusted things since you got stuck?

Bee Sort By Sam may scratch that merge game itch

https://games-by-sam.com/bee-sort-by-sam/

The same creator has a fun daily deduction game as well.

Dedicate your resources to optimizing populations of Pacific salmon, aka Chinooksmaxxing.