I had a different idea before, but it was too difficult to finish in time so I made up a new one.
I thought about using real time in the game. Then I remembered replay games, where you replay the level with a new character, and other characters repeat actions you did previous times, like Chronotron. But the player automatically switches each hour. So you have to time your actions. You can, for example, press a button, close the game, open it 30 minutes later and press another button.
It’s very hard to test, I have to change my system time constantly. I won’t be able to work on it tomorrow, so I guess it’ll be tough to finish it. I think I’ll keep updating it after the MiniLD release.