Bend is a word game on the surface of a Klein bottle. The board wraps in an unusual way: moving right past the last column continues on the mirror row — row 1 joins row 5, row 2 joins row 4, and row 3 joins itself — and moving down past the bottom wraps to the top of the same column. Move around the board with the arrow keys; because the board is a Klein bottle the arrows follow the wrap, so at an edge you may jump to a different row or column. Press Enter or Space on a rack tile to pick it up, then Enter on a board square to place it, or Enter on a tile you just placed to take it back. Activate the Submit button to score. A word that wraps top to bottom scores double; a word that bends across the flip seam scores triple; you cannot score the same word twice, but reforming it across a seam upgrades it.
- Tap a rack tile, then a board square — build a word of 2+ letters along one row or column. Any cross-words you form must be real too.
- Crossing a seam multiplies the word: a flip bends it ×3, a straight wrap ×2. Reforming a word with a bigger multiplier upgrades it. A full across row-pair is a bend loop — +50, gold.
- Every 20 points earns a trash — pick a rack tile, then trash, to swap it for a fresh one.
- Mon–Fri — Klein bottle (5×5)
- Sat — projective plane (5×5, a double flip)
- Sun — mega Klein bottle (7×7)