Only One Way by ThatGuy03, is a game where you must reach an endpoint using a very specific route. The game has 20 levels and an accreditation level.

Gameplay

You begin with a black map, an orange character, a green end checkpoint, and a series of yellow dots above the map. The yellow dots effectively show which parts of the map you are allowed to use. The dots are on a 5x5 grid which is subsequently mirrored. There is a single layer of brown blocks which separates the black map from the yellow dot grid.

A dot in the lower left corner of the yellow grid corresponds to the lower right of the black map. While the maps are mirrored, they are not flipped; so the rows correspond (you merely concern yourself with the columns).

The only additional entity are teleporters. You enter the red squares, and exit from the blue square. You cannot go backwards.