Spike

Spikes are the single biggest obstacle in The Impossible Game, and the most common one, too. Any collision with one will result in the destruction of the player cube, so they should be avoided at all times. The largest group of Spikes the player can safely jump over on a level surface is three; any larger and the Player Cube will crash by the fourth. Nevertheless, sets of four and even five exist in the game, usually for decoration or assisted jumps.

Description
Spikes take the form of black triangles with a thick, white outline. They are exactly one unit tall and one unit wide.