Official mediaPlinky Plonky Rebirth
Rebirth in Plinky Plonky: when runs end, what Rebirth Points buy in the skill tree, and how the tree saves you Robux.
Rebirth is the between-run layer. A run that misses the Final Chance ends and credits Rebirth Points, which you spend on a skill tree that makes the next run stronger. Rebirths are also a tracked leaderboard category, and the developer notes that at least one paid pass can be unlocked free in the tree. This category covers the parts the game page states.
