Tokens

Head tokens are collectables in PsiloSybil that are present in every non-boss level. They take the (simplified) appearance of the head of that level's NPC mushroom, and collecting all of the tokens in a level allows Sybil to free the mushroom.

Collected tokens are not permanently saved; upon death, all tokens collected after the last checkpoint activated are lost. In addition, the mushroom is only freed if Sybil approaches them with all the tokens. However, the freed mushroom is permanently saved in that moment, so that the player may die or even quit the level and not lose their progress.