★★★★★
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Optimized level content for a better experience.
A row of test tubes, a breezy number-sorting challenge. Tap, move, merge—enjoy the little joys of every upgrade. • Tap the numbered token at the top of a test tube and move it to an empty slot or to a tube with the same number. • When a tube fills with the same number, tokens automatically merge into the next level and stay in that tube to keep progressing. • Each tube has a fixed capacity—using empty slots wisely determines your sorting efficiency. Every action gives crisp feedback: a clean interface, intuitive controls, and the chain reactions during merges deliver a satisfying sense of steady progress. As levels advance, number types and obstacles increase, letting the pace naturally shift between relaxation and thoughtful planning, so it’s both a stress reliever and a brain teaser. No time limits—pause or resume anytime, ideal for a short break or a focused challenge. With a bit of patience and good judgment, slowly turn chaos into order and feel the small moments of achievement each time things fall into place.