!Press the green flag twice! !Read instructions! You have been put into a facility. Some cells have mysterious numbers on them that you don't understand. Those cells predict your future. When the number reaches 0, you must be there. Use wasd to move, z to undo, x to restart, and c to enter worlds/levels. And recursion. By travelling into the past, you can change your future. But everything must resolve. When your newly-rewritten future reaches its apex, your future isn't as rewriteable as before. As you go deeper and deeper, the rooms are finally finished, but sliding down, you're pulled back to reality. And some rooms can be beaten faster than they're "intended." This is completely intended.
S.U.C.N.E.F. is short for the Latin phrase, "Satisfacere ullis compensationibus ex futuro," meaning "Satisfy any offsets from the future."