Checkpoint

Checkpoints are ingame objects that the player can interact with by touching them. Whenever the player dies, he will resume the action at the beginning of the level, unless he has touched one of these objects. This will allow him to resume the game at the same position of the last used checkpoint.

They can be found on the floor as well as on the ceiling.

There are two checkpoints in each level, except in the alpha levels, which feature no checkpoints at all.

Related Achievement
The achievement Refusing Help requires the player to finish a level without touching any checkpoints.