Note: This page is taken from

There are many ways to die in N:

Each time the player dies, they are allowed to retry the level immediately, with their time limit reset to what it was at the start of the level. As it says in the list, one can also die by running out of time. Prior to version 1.4 this meant restarting the entire episode, but has now been changed to simply restart the level as if the player had died.