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Tiny Spirit. She rises.
It moves.

A small spirit thrusts and jumps her way up through limbo, after a light that has never once waited for her.

How it works

Hold and let go

Thrust

Hold to push her upward. Let go and she comes back down. That is the entire control scheme, and it is enough.
Ride it out

She doesn't stop the instant you do. Whatever you were doing a second ago is still happening, so aim early.
Use the ledges

Limbo comes with somewhere to land. Not many places, and not for very long, but they're there.
Follow the light

It's the only direction the game gives you. It also moves, which is the part that turns a direction into a trial.

The setting

The climb

Nothing is explained, because nothing needs to be. She's a spirit, this is limbo, and up is that way. Anything more would be a cutscene.

The light

Reaching it isn't really the point, which is the sort of thing only a game set in limbo gets to say with a straight face.

Deliberately

A story: There's no plot to follow and no one to rescue. She goes up. That's the arc.
A tutorial: You have one input. Twelve minutes of instruction would be twelve minutes of padding.
A finish line: The trial is endless on purpose. You stop when you stop, and nothing marks it.
In a hurry: It's a game about drifting upward in the dark. Rushing it rather misses the room.

iPhone iPad

Tiny Spirit is free, and it doesn't end. She goes up until she doesn't.

Tiny Spirit has no last level and no score to beat, so there's nothing to be behind on. Put it down whenever. Limbo will keep.