← All Community Games topics

"My game won't upload"

• index.html not at the root of the .zip. A zip containing a single top-level folder (e.g. from "Compress" on macOS, or a build tool that wraps output in dist/ ) will fail — re-zip so index.html is directly at the top level, not nested one level in. Check by opening the zip: you should see index.html immediately, not a folder you have to open first.
• File too large. Large binary assets (uncompressed audio, big textures) are the usual cause — compress audio to a lossy format and textures to a reasonable resolution before zipping.

"My game loads but nothing I do seems to save/submit"

• Check the browser console inside the game's iframe. An unhandled rejection from a forgotten try/catch will usually just silently stop your game's logic at that exact point, with no visible error to the player — but it WILL show up in devtools.
• Trying to fetch() your own API, or a third-party API. This is blocked on purpose (see "What the sandbox blocks", below) — go through window.DavidnetSDK instead for anything that needs to reach Davidnet, and note that direct calls to any OTHER API are blocked too, not just Davidnet's.
• Reading/writing localStorage expecting it to persist. It's polyfilled to in-memory-only storage and is wiped on every reload — use saveJsonBlob / getJsonBlob (see Save data ) for anything that needs to survive a reload.
• Getting rejected with "RATELIMIT" . See Rate limits — likely something is calling an SDK function in a loop (e.g. every frame) instead of on a game event.

"Calling an SDK function every frame"

This is the single most common mistake. Repeat calls to unlockAchievement or applyHighscore are cheap no-ops server-side, which makes it tempting to call them from your update loop "just in case" — but each call is still a real network round trip and counts against your rate limit . Always trigger from the actual event instead:

// Don't do this:
function update() {
  if (boss.isDead) {
    window.DavidnetSDK.unlockAchievement({ id: "boss_kill", name: "Boss Kill" });
  }
}

// Do this instead - track whether you've already handled it, or better,
// call it from the exact place the boss actually dies:
let bossKillHandled = false;
function update() {
  if (boss.isDead && !bossKillHandled) {
    bossKillHandled = true;
    window.DavidnetSDK.unlockAchievement({ id: "boss_kill", name: "Boss Kill" });
  }
}

function onBossDeath() { // called once, from the boss's own death logic
  window.DavidnetSDK.unlockAchievement({ id: "boss_kill", name: "Boss Kill" });
}

What the sandbox actually blocks

Your game runs inside a locked-down <iframe> , but that does not mean "no internet access" — it's more specific than that:

• Loading things is fine. Pulling in a game engine, library, font, image, or sound/video from an external CDN (cdnjs, jsdelivr, unpkg, Google Fonts, ...) works exactly like it would on any normal webpage.
• Your game's own code calling out is blocked. It cannot make its own requests to other websites or APIs (no fetch , no raw WebSocket to a random server) — that's blocked on purpose, mainly so a game can't quietly send players' data somewhere else.
• No real cookies or browser storage. Anything that needs to survive a reload must go through the SDK's save data functions , not localStorage .
• Talking to Davidnet itself (scores, saves, multiplayer) always goes through window.DavidnetSDK , never a direct network call — that's how it gets through even though direct outbound requests are blocked.
• Nesting another iframe inside your game is blocked outright. No legitimate HTML5 game needs to embed a third-party iframe.

General rules

• All DavidnetSDK functions return a Promise and REJECT on error or timeout (10s) — always wrap calls in try/catch so a network hiccup never crashes the game.
• Call getJsonBlob() once on load to restore progress, and saveJsonBlob() whenever the player's state changes meaningfully — not every frame.
• Do not implement your own leaderboard UI assumptions beyond what getHighscores() returns; the platform already renders a full leaderboard and highscore display around your game.
• Still stuck? See the full topic list or contact support .