BugArcade

Play it live: https://himanshu748.github.io/bugarcade/ Can you make this app lose your note in three moves? BugArcade turns real React bugs into playable challenges with a reproducible replay and a regression test that proves the fix. Catch a real bug, reveal the minimal timeline and cause, then run the same moves against the fix. Five playable cases cover lost state, optimistic rollback, stale search, duplicate submission and cleanup races, with personal stars for catching the bug, meeting the move target and checking the fix. For supported React/TypeScript starters, Muse Spark Open proposes browser actions from source and timestamped recording frames. Those actions drive Playwright in Modal. The verifier repeats the failure, minimizes the sequence without weakening its assertion, and checks the fixed app. A captured note investigation went from four actions to three; a separate coupon case, given no plan or hints, went from three to two. Both produced three buggy failures and three fixed passes, and each exact exported test failed buggy and passed fixed. The public arcade serves the authored seed cases and captured evidence without new model calls. Investigating your own app uses the local creator with approved model access and a sandbox budget. Built during the hackathon, October 28–November 3, 2026.