Nice game! I got a bit confused by the falling asleep thing, as my green bar would be still about half full, yet I'd lose and it would say I fell asleep. Other than that though, this was very fun (even though I'm terrible at it)!
There is a fatugue bar at the top which is basicly a timer for each level. A good way to do it is just to look at the colors. Thank you for reviewing it!