らくがきスマッシュ / Doodle Smash
Draw a character and it becomes your fighter: size, shape and colour set its stats and element in a knockout party brawler for up to four players. The developer says Claude does the programming.
Links go to the official store or developer page. Last verified Nov 8, 2026.
Steam lists General Mature Content. The developer's note: an action game in which doodle characters punch and use special moves to knock each other off the stage, with no blood, gore or death; players can draw anything, and drawings by other players, shown in online matches and in the Doodle Plaza (Steam Workshop), may include content not suitable for all ages (Doodle Plaza items can be reported or hidden). (Steam)
No ads are shown on this page.
Where to play
Every platform this game is on. Links are checked against official sources; we never host or mirror games.
- View on SteamSteamReleased$5.99
Download through the Steam app. A free Steam account is required.
Desktop · Steam
About らくがきスマッシュ / Doodle Smash
らくがきスマッシュ / Doodle Smash is a 2.5D knockout-style party fighter on Steam in which your own drawing is your fighter. You draw a character with pens, fills, lines, shapes and stamps, and the game reads the drawing: size sets weight (big is heavy and tough, small is fast and jumps well), a tall shape boosts jumping and a wide one speed, and the colours set attack or defense and one of ten elements such as fire, lightning and ice, for 30 elemental skills. Every drawing gets the same total of five stats, so a child's scribble and a skilled drawing both have a way to win; the developer says the quality of the drawing is not judged at all. You fight with shields, perfect guards, throws, ledge grabs and smash attacks across 20 stages, up to four players on one screen with a keyboard or gamepad, against CPUs at five levels, or online in a four-player ranked battle royale and friend rooms with a six-digit code; online opponents see your drawing as you made it. The Doodle Plaza on Steam Workshop shares drawings. Updates since launch added a four-player co-op battle against giant bosses (Ver 1.2), gates whose defeated monsters can join you (Ver 1.3) and a roguelike labyrinth (Ver 1.4). The developer, 白鳥のぞみ, made it alone and says Claude does the programming, from the game systems to online play and an automatic mode in which the game plays itself and takes its own screenshots, while Codex made the button, sign and store images and the local video AI H3 made trailer footage; the developer decides what to make and checks whether it is fun. Released on Steam for Windows and macOS in five languages.
Screenshots and art
らくがきスマッシュ / Doodle Smash key art · Steam store artwork
How it was built
Partially verifiedIn a development log on GameWith Indie (7 Nov 2026, Japan time) the developer lists the division of work as “プログラム（コーディング）… Claude” (programming/coding: Claude) and adds “ゲームの仕組みからオンライン対戦、自動で遊んで撮る仕組みまで、プログラムは Claude と一緒に書いています” (from the game systems to online play and the system that plays and records automatically, the program is written together with Claude), while the developer decides what kind of game it is, whether it is fun and whether it feels good, and plays everything the AI makes before releasing it. The developer says the first version was a browser prototype (TypeScript, Three.js and a 2D physics engine, about 5,700 lines in one file), that the numbers and formulas were then extracted into a design document and the game rebuilt in Unity, and that the online play over Steam's free lobby and networking was planned in consultation with Claude. The developer also writes of being one of the “エンジニアではない人” (people who are not engineers) now making games with the help of AI. Which Claude app was used is not stated.
- Developernote article (7 Nov 2026): the same division of work, “プログラム（コーディング）… Claude”, and “AI に「作る作業」は任せても、「何を作るか」と「それが面白いか」は自分で決める” (leave the making to AI, but decide yourself what to make and whether it is fun). The developer says the key was to have Claude build the ways of checking its work too, and to tell it not only how to build something but how to verify it. — note (白鳥のぞみ)
Per the developer, Codex made the images: the on-screen buttons, sign art and the Steam store images, prompted with reference pictures plus written descriptions of each character's colours and shapes. It is not credited with code.
Prototyped in the browser with TypeScript, Three.js and a 2D physics engine (about 5,700 lines in one file, with 30 moves, shields, throws and ledge grabs), then rebuilt in Unity against a design document that holds only the prototype's numbers and formulas. A drawing's stats come from deterministic on-device image processing of its size, shape and colours; per the Steam AI disclosure no generative AI runs during play and nothing is sent to an AI service. Online play uses Steam's free lobby and networking with the host's PC running the match, so there is no game server; drawings are sent to the other players as images. Many built-in modes start the game, play it automatically against every stage and boss, take screenshots and quit, and the store screenshots and trailer footage were captured this way. Per the Steam disclosure, some store art, in-game images (UI decorations, stage backgrounds and some illustrations) and the background music and jingles were made with generative AI and then selected and edited by hand; trailer footage of a drawn lion coming alive was made with the video AI H3 running on the developer's own PC.
- Engine / framework
- Unity
- Languages
- Not disclosed
- Team size
- 1 (solo)Developer ReportedGameWith Indie (白鳥のぞみ)
- Initial build time
- Not disclosed
- Development time
- Not disclosed
- Development cost
- Not disclosed
- AI-written code
- Not disclosed
“プログラム（コーディング）… Claude”Verification notes: AI use from the developer's GameWith Indie development log (published 6 Nov 2026, 17:34 UTC, i.e. 7 Nov in Japan) and note article (7 Nov 2026, 04:37 Japan time), both read on 8 Nov 2026 (note through its public API). Features, price, platforms, languages, release date, AI disclosure and the content note from the Steam store page and store API on 8 Nov 2026; the developer and publisher on Steam are 白鳥のぞみ. The code claim rests on the developer's role list (“プログラム（コーディング）… Claude”) and the statement that the making is left to AI; the developer also writes that the program is written “together with” Claude, and no share of AI-written code is stated, so none is recorded. The developer writes “Claude”, not Claude Code, so the tool is Claude. Codex is credited by the developer with images, which is unusual for a coding agent; it is recorded as the developer states it. H3 is a video model that is not a tool we track. Stats come from fixed image-processing rules (size, shape, colour), not from an AI model, per both the developer and the Steam disclosure. The idea of free online play came from the indie game めっちゃカメレオン, per the developer; nothing from it is used. Steam shows 1 user review and no score. The developer's X account is @ViVi_gram (from the GameWith log). The game was not played.
Development history
Released on Steam (release date on the store page).
OfficialSteamVer 1.2 adds a co-op battle for up to four players against giant bosses.
DeveloperGameWith Indie (白鳥のぞみ)Ver 1.3 adds gates whose defeated monsters can join you as companions.
DeveloperGameWith Indie (白鳥のぞみ)Ver 1.4 adds a roguelike labyrinth explored with your drawn fighter.
DeveloperGameWith Indie (白鳥のぞみ)The developer publishes two articles on making the game alone with Claude, Codex and H3.
Game performance
Each figure measures something different — concurrent players, owners, downloads and sales are never interchangeable and are never added together. Labels show where each number comes from.
Steam
$5.99 on the Steam store API (cc=us) and ¥790 in Japan on 8 Nov 2026. Windows and macOS; online play and the Doodle Plaza need an internet connection.
All reviews as shown on the store page on 8 Nov 2026; Steam shows no score until a game has 10 reviews.
Not publicly available: All-time peak concurrent players, Concurrent players, Positive Steam reviews, Estimated owners, Gross revenue.
Reviews & rankings
Not yet reviewed by our editors.
Not currently ranked.
Sources
| Source | Type | Published | Accessed |
|---|---|---|---|
| らくがきスマッシュ / Doodle Smash on Steam Steam | Store page | Not confirmed | Nov 3, 2026 |
| 個人開発で「描いた絵が戦う」対戦ゲームを作った裏話 ― ブラウザの試作から Steam 発売、2週間で3回の大型アップデートまで GameWith Indie (白鳥のぞみ) · Japanese | Devlog | Nov 7, 2026 | Nov 3, 2026 |
| AIをパートナーに、ひとりでSteamゲームを作った話 ― Claude・Codex・H3 の分担と、RTX 5070 Ti が変えたこと note (白鳥のぞみ) · Japanese | Devlog | Nov 7, 2026 | Nov 3, 2026 |
- Release date
- The Steam store page gives 22 Oct 2026, and the GameWith log opens with a release on 22 October; the same log and the note article later say the release slipped from 16 Oct to 23 Oct after a delayed Steam review. The difference may be the time zone; the record uses Steam's date. (Steam, GameWith Indie (白鳥のぞみ), note (白鳥のぞみ))
Get your badge
Made this game? Add a “Featured on VibeGameDB” badge to your site, GitHub README or itch.io page.
<a href="https://vibegamedb.com/en/games/doodle-smash" target="_blank" rel="noopener" title="View らくがきスマッシュ / Doodle Smash on VibeGameDB – the database of AI-built games">
<img src="https://vibegamedb.com/badges/featured-light.svg" width="250" height="54" alt="Featured on VibeGameDB – らくがきスマッシュ / Doodle Smash, an AI-built game" />
</a>Similar games
