Xaya Arcade Playground.

Attach your game, play it as two players, and check it actually works — before you spend your one irreversible shot on the real arcade.

1 · Attach your game

The URL: /g/<slug>/ · lowercase, digits, dashes
Your on-chain registry game type — must equal GAME_KEY in your code, or your lobby stays empty. Not the hosted namespace (NEXT_PUBLIC_GAME_ID=xarc), which every bundle bakes the same.
to
Only what your blob's tests actually prove
Lowercase hex, even length — from your blob/MANIFEST.md
Where your source lives, https. The pre-flight requires one and it becomes the Source link on your card, so it has to be yours. Private is fine — the link just won't open for anyone else.
Goes live in a few seconds. No review, no queue.

2 · Play it

Games on the playground right now. One browser profile is one player — the test wallet you pick and its session keys are stored per profile, so every extra tab or window is still the same player. To be player 2, open the same game in a private window or a second browser.