The combination of cute graphics, amazing level design, good sound design, and super satisfying haptics make this game very unique, even if the concept seems strangely familiar at first. Absolutely worth the $2 the developers ask for to unlock all the levels. It can be frustrating in the later levels, but that's part of the fun once you eventually figure it out (you definitely have to replay some levels multiple times, especially if you want to get more stars).
Great design, only one in-app purchase to unlock all the levels, no obnoxious ads, no ridiculous monetization (I can think of a few ways the developers could let you cheat or pay to win) — I know the bar for mobile games is on the ground, but still, this game absolutely deserves the praise and what little of your money it asks for. 5 stars.