Where I’m at
Well I haven’t made a post yet, so here it is. I’m working on a game that still involves darkness + the 10 seconds for a mechanic.

The idea here is the game is completely black. You can however trigger a flash light to light things up for 7 seconds. After 3 more seconds you may light it again. You need to collect all the coins and make it to the door.
So far I have the light mechanic and coin collection working, next on the list is traps & enemies :).