The player is then introduced to Lee from the dog's perspective after waking up to find his owner sleepwalking through his bedroom window, and leaping after him.

Throughout the game Lee will relentlessly walk in the direction he is facing, the problem is there are objects and pitfalls in his path that can ultimately wake him up or even kill him.

The player controls Ralph in order to manipulate either Lee, or the objects he is likely to walk into, to see him safely to the end of a level.

Although it is possible for Lee to die, resulting in a life lost and restarting the level, Ralph is invincible, surviving otherwise fatal incidents with comedic effect.

If all the levels are successfully completed, Lee finally returns to his bed and crawls back in.