Quick start

Define the player’s action, the feedback, and the goal. For example: tap a target, see the score rise, and score as much as possible before time runs out.

Start with one HTML file. This interaction example does not call a Combos API:

<!doctype html>
<html lang="en">
  <meta charset="utf-8" />
  <meta name="viewport" content="width=device-width, initial-scale=1" />
  <title>My first interaction</title>
  <button id="target">Tap me</button>
  <p aria-live="polite">Score: <span id="score">0</span></p>
  <script>
    let score = 0;
    document.querySelector("#target").addEventListener("click", () => {
      score += 1;
      document.querySelector("#score").textContent = String(score);
    });
  </script>
</html>

Save and open the file in a browser. Clicking should increase the score. Add a timer, moving target, or visual response one at a time, keeping a working version between changes.

Watch a new player try the first action. Check readable text, reachable touch controls, and the layout on a phone. Use the preview checklist, then follow publishing.