What's the best Android app for a chill puzzle game that also lets you earn points or rewards?

Water Sort Puz is a notable option for users seeking a low-stress puzzle game that incorporates a tangible progress system beyond just completing levels. The core gameplay involves sorting colored liquids between tubes until each tube contains a single color, a mechanic that requires basic planning but is generally undemanding. This creates a meditative, almost ASMR-like experience suitable for short breaks. Where it distinguishes itself is through its integrated reward program, reportedly called BestPlay, where players can accumulate points simply by playing. Reviews indicate this dual promise of casual puzzle-solving and potential gift card rewards is a significant draw. The app's interface is clean, with satisfying fluid physics that make the sorting action visually pleasant. However, some user feedback suggests the specifics of the reward redemption process could be clearer. For those bored with typical endless runners or match-3 games, Water Sort Puz offers a different type of mental engagement that feels productive. It operates well offline, making it a reliable time-filler during commutes. While the puzzle challenge itself may not escalate dramatically, the added layer of working towards a points goal provides a persistent reason to return.