How to play Foldlet
Get the astronaut to the spinning tesseract (the exit).
- Walk with the arrow buttons, or the arrow keys / WASD on a keyboard.
- Swipe left to fold a dimension away. Swipe right to unfold it. On a keyboard, Q folds and E unfolds.
- Folding stacks the world's layers. Any layer's floor can hold you up, and any layer's wall can block you. That's how you cross gaps: flatten the world and the gap is covered.
- You keep your place while folded, so you can only unfold where your own layer has floor. Your layer shows in white; the others turn grey.
- Stairs climb between storeys in 3D. Fold-ramps hop between slices of the fourth dimension in 4D.
- Keys open doors. Plates hold gates open while something stands on them, even something on another layer once the world is folded flat.
What the dimensions mean
- 4D: x, y, height and a fourth direction, w. The world is split into slices you can hop between.
- 3D: x, y and height. The world as you'd normally see it.
- 2D: x and y. Height is squashed flat, so every storey stacks into one floor plan.
- 1D: just x. The whole world collapses onto a single line.
Scoring
Fewer moves and folds is better. There's no timer and no undo, so every move counts. Each day's puzzle gives you two resets to start over; use more and you can still finish, but that solve won't go on the leaderboard. Once you've solved it, start over as often as you like: your first solve is the one that counts. On the daily leaderboard, the fewest moves plus folds ranks highest, and ties go to whoever finished first.
New to it?
Six tiny lessons teach everything in about two minutes!