Mushroom 11 is a 2015 puzzle-platform game developed and published by Untame.

[1] The game is a 2D side-scroller where players control a green mushroom by deleting parts of cells while it simultaneously regrows.

[5] The music for the game was licensed from The Future Sound of London.

[6][7] Mushroom 11 received positive early critical response for the game's unique mechanic and theme.

[18][19] IGN awarded it a score of 9.0 out of 10, saying "Mushroom 11 is a strange and unique game that reshapes the way you think about its puzzles.