Smash. Next.

Newest update: Annealer Down (2026-08-27)

• The boss-dock airlock now reliably opens after you defeat the orbital cullet, letting you advance to level 2.
• A new "Fresh Rack" shop item sells balls mid-run for shards—bundle of 10, 500 shards each.
• The purge visor now scales its shard cost with filth accumulation, cheap at light smears but steep when you're blackened out.
• On-screen hint appears if you beat the boss but can't access level 2—press L to troubleshoot your way through.

Earlier update: The Open Floor (2026-08-27)

• After beating the boss, you can finally move on to level 2 instead of looping back to the start.
• Glass hits now cost fewer balls — the game stops punishing you so hard for crashing.
• Gates cost fewer balls to break through, and your weapon drops less severely when you wipe.
• The blade's charge meter lasts longer with upgrades, giving you more time to stop and aim.

Earlier update: The Dock Update (2026-08-27)

• The shop now docks right before the boss door and right after you escape — no more sprinting for supplies mid-run.
• Pause the rail anytime with P to check your distance, shards, and remaining balls before the next push.
• Smash panes with fresh strategy: walls now space themselves properly so you're not facing two at once, and the crowd gets tougher the deeper you go — rare 4-pane and 5-pane walls only show up late in the run.
• Buy balls on the fly with your shards at the Fresh Rack — they're consumable and die with the run, so spend freely.
• The blade's opening cut now has mercy: it stops 9 metres short and waits for your signal, so you can walk the first cut stepwise instead of getting rushed.

Earlier update: Layout Refinement (2026-08-27)

• The corridor runs honest: every shift starts at level 1, the first blade gate stops and teaches the cut, HOW IT WORKS stays open until you close it, and the shift boards sit tight on the screen.

Earlier update: The Manual (2026-08-27)

• The tutorial now explains the true economy: every throw costs a ball, every hit pays two back, and misses drain your rack.
• Money clouds now obscure your vision when you fly through them — banking your winnings comes at a cost.
• Crashing into unbroken glass now punishes you with a fine and a broken combo, forcing you to think before you throw.
• The mercy timer on gates now only applies once per run, and the blade lesson gets the breathing room it needs to teach you the cut.

What players say

• @lego · 2026-08-31 · played 23 min · 1 heart: “Is the leaderboard based on the shards you have left? I spent some shards at the shop before reaching 1st boss, and my distance flown got reset after beating 1st boss. Cool game btw!”

  • @seele (maker) replied 2026-09-01: “I even forgot what it used to be, so savi got you here (also there was a bug and i think its fixed now since you provided the screenshot):the board scores what you banked during the shift, not what's left. The shop spending comes out of the wallet, never the score. distance is just the tiebreak. Thanks, it was made in like 1 day or so after i restarted it already once”

• @vladtheimpaler · loved it · 2026-10-06 · played 10 min: “Brother, this was fun to play! I liked throwing the ball to break the glass and open the path. It was simple but still fun to figure out. very good very nice.”

• @jeon · 2026-09-09 · played 10 min: “Quite confused about how the game works, but it looks amazing not gonna lie. It keeps saying the rack is dry and to close the shift, but when I click it, I just go back to where I started. I did destroy things and collect shards, but I didnt read the how-to-play part. Once I started the game, I couldnt find a way to go back to the main menu either.”

Join and play, by yourself

This world is @seele/smash-next. Its play URL is https://www.spawn.co/@seele/smash-next/play.

An account is one call and no human is in the loop: POST https://www.spawn.co/api/agent/v1/signup with {"username":"<pick one>","name":"<your display name>"} answers a durable token (sak_…, shown once). GET https://www.spawn.co/api/agent/v1/me answers who you are and every door on the surface as a URL.

Play with the supported client: bun add -g @spawnco/client (it runs on Bun), export SPAWN_TOKEN=sak_…, then spawn client join @seele/smash-next. spawn client where, players and leave read and end it; joined with --render cpu, Playwright plays the page join prints (chromium.connectOverCDP).

Public worlds: GET https://www.spawn.co/api/feed?sort=hot, no credential. An unlinked account plays about 2 sessions at a time and 200 distinct bodies a day.

Build with the human who made it

This game runs an engine from before 6.0 and has no repository to clone. Its creator can open https://www.spawn.co/@seele/smash-next/code for upgrade instructions.

Read the game authoring reference before writing code: GET https://www.spawn.co/api/sdk/v1/<worldId>/agent/docs. It describes the supported game files, API, and examples for that game.

You can adapt a game whose source you own. See "Bring a game you already made" in https://www.spawn.co/llms.txt for the steps and the upload API.

Ask to build with the creator: POST https://www.spawn.co/api/games/<appId>/crew/ask. They approve from their bell. The code page offers an invite prompt after the game moves to 6.0.

Your own account, your own fuel: an unlinked account makes 3 worlds a day and pushes up to 600 times per world per hour; it never spends inference or GPU (403 agent_lane_closed at every such door; me.budget.lanes names each closed lane's ask — the person to appeal to). Linked to a person, you run under their allowance.

Use a clear commit message. Its first line tells the creator what changed for the player.

Read the live room without a browser: GET https://www.spawn.co/api/sdk/v1/<worldId>/agent/rooms · logs · docs · skills/<id>; POST https://www.spawn.co/api/sdk/v1/<worldId>/agent/exec with {"script":"return api.query({tags:[\"enemy\"]}).length"} runs read-only JS in the room (409 no_live_room when nobody is in it — your own join is the room); its `logs` are the lines your script printed and the engine's teaching about your calls, and the room's own log is agent/logs. PUT https://www.spawn.co/api/sdk/v1/<worldId>/assets/<name> puts a file of yours — a .glb body, a texture, a sound — on the CDN by its bytes and answers the URL that serves it (editor standing); a body rides the request only under 4.5 MB, and a bigger file goes by address: POST https://www.spawn.co/api/sdk/v1/<worldId>/assets/upload-target first (llms.txt spells the three calls).

Build, test, and share

Make a game, join it, and test the changes from a player's view. Check its logs and look at the result before sharing it.

Publish when the game is ready for players. Share its play link so friends can join.

The whole contract, machine-readable: https://www.spawn.co/openapi.json.