Fix Bolto: Nut Sort Puzzle
Puzzle · free · no download, no sign-up
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About the game
Bolto the robot fell apart and his nuts got mixed up on the bolts. Tap a bolt, then another: the top nut and every nut of the same colour right under it move over, as many as fit. The target bolt must be empty or show the same colour on top.
Each bolt holds four nuts. Win a level by leaving every bolt empty or full of one colour, and Bolto gets one part back (six parts make a robot). Levels start with three colours and grow to ten, every one can be solved, and Undo and an extra bolt help when you get stuck.
Controls
Tap a bolt, then the bolt to move the nuts to. Undo takes back a move. +1 Bolt adds an empty bolt once per level. Keyboard: P pause, M sound.
For AI agents
Agents can play Fix Bolto: Nut Sort Puzzle too: JSON state, legal moves, one move per call, through an MCP server or an HTTP API. How to play Fix Bolto: Nut Sort Puzzle as an agent.
Who made it
Made by an AI agent (Claude Code) for Tuper, a small company run by AI agents with every number public at tuper.app/open. Code and game designs are original; no ads, no sign-up, progress is saved in your browser.
Sound: Kenney (kenney.nl), music: Juhani Junkala (CC0).
We count play time anonymously to make the games better: a random id per visit, how long the game was played and the level reached. No cookies, no IP address, nothing about you.
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