Choose how friends take part
A multiplayer puzzle can be a race, a cooperative challenge or a turn-based contest. In a race, everyone solves the same puzzle and the first correct answer wins. In a cooperative game, players contribute to a shared solution. In a turn-based game, one person acts while others plan. Pick one format before asking for a collection of unrelated mini-games.
Words, patterns and small logic grids make useful first projects because the core rule can be explained in a few sentences. Specify whether everyone sees the same clue and whether wrong answers carry a penalty. If the game depends on spelling, define case, spaces and accepted variants. A puzzle should reward reasoning rather than guessing what the interface will accept.
Make the prompt testable
Include a small set of puzzles whose answers you already know. Ask for an explanation after a solved round and a hint that helps without giving away the answer. Decide how many hints a player can use and whether they reduce the score. For a timed puzzle, show the timer clearly and leave enough time for someone reading on a small screen.
Avoid asking for an unlimited stream of perfect puzzles in the first version. Generated questions can have ambiguous answers or accidental duplicates. Start with a reviewed set, then expand after you have played every item. If you use factual clues, check the facts. If you use a word list, check that you have permission to use it and that its vocabulary suits the game's age rating.
Check solutions and shared state
For each puzzle, record the intended solution and try at least one plausible wrong answer. Check whether another solution is equally valid. A logic puzzle that quietly allows two answers needs a revised clue, not a harsher error message. Test punctuation, repeated letters and empty submissions. Make sure the explanation actually follows from the information shown to players.
Play with two devices. If one player answers while another uses a hint, both should see a sensible result. Decide how simultaneous correct answers are scored. For cooperative play, tell players whose action changed the board, and make accidental double taps harmless. Try the game with someone who has not read your prompt; their questions reveal missing instructions.
Adjust difficulty with evidence
Track which clues people finish quickly, where they ask for hints and when they give up. Increase difficulty by adding a meaningful deduction, not by shrinking text or making the timer severe. A short practice puzzle helps new players learn the controls without losing points. Offer a visible way to understand a wrong answer before the next round starts.
Try a public puzzle below before building, then open Create with your own description. Playing is free in the browser; creating has daily limits and may use credits. A live example shows the room and input flow, but your puzzle rules still need their own tests. Share the room invitation after you have checked the answers and phone layout, and ask friends about one specific rule each round.
A prompt to start from
Make a cooperative word puzzle for 2 to 4 players. Use ten reviewed five-letter answers with clear clues. Players take turns suggesting a letter, share three hints, and see an explanation when the word is solved. Ignore letter case, show whose turn it is and provide large on-screen letter buttons.