When you hit the same organ, the organ will “evolve”! Evolve organs more and more to get bigger organs! The goal of the game is to get a high score so that the organs do not overflow from the beaker. Aim for the first place in the score ranking!
Estimates — owners use the Boxleiter method (reviews × 32), wishlists proxy followers × 12, revenue uses ~62% of list price × est. owners. These are rough industry heuristics, not official data.