Turn messy playtest notes into a ranked list of what to fix next. Tags each note (bug, confusion, frustration, boredom, delight, idea), tallies them with a script, ranks issues by how many testers hit them and how badly, and lists the moments players loved so you protect them.
Design tile-grid game levels as plain JSON and check them with a validator: equal-width rows, known tiles, one start, an exit you can actually reach (keys and doors included), reachable coins, and a closed border. Writes a JSON report you can keep in CI.
Make a working game feel good: an ordered juice pass that adds screen shake, hit stop, particles, squash and stretch, easing, score popups, flashes, and tiny Web Audio sounds to the moments that matter, each behind a config value and a reduced-motion setting. Ships dependency-free canvas snippets.
Write a one-page game design doc from a rough idea: the hook, core loop, controls, the one rule that makes it interesting, scope cut into must, nice, and later, and a first-playable plan. Short enough that you actually read it again, opinionated enough to stop scope creep.
Turn a one-line game idea into a complete, playable single-file HTML5 canvas game: game loop, keyboard and touch input, score, best score, game over, and restart. Ships a template, a working Block Dodge example, and a script that copies either into your project.
