Season Runners
Free · play online in your browser, no download
A jump-and-run whose world follows the calendar: carnival in February, the beach in summer, a ghost night in October and snow in December.
Official site seasonrunners.com, verified Nov 3, 2026. Linked from the developer's own Reddit post on r/aigamedev and from the developer's itch.io page; the site's legal notice names Simon Klever as the operator.
Rights holder / original work: The Grinch (Dr. Seuss Enterprises)
The game's own pages say that in the Christmas world you collect presents as Santa “before the Grinch gets them” and list the Grinch among the enemies, using the name of Dr. Seuss's character. We did not see how the character is drawn. No source mentions a licence. (seasonrunners.com (Simon Klever))
VibeGameDB lists this game only to document that it was made with AI coding tools. We do not host it, we do not represent the rights holder, and listing it does not mean it is licensed.
Where to play
Every platform this game is on. Links are checked against official sources; we never host or mirror games.
- Play free — official siteBrowserReleasedFree
Runs in a desktop or mobile browser. No download.
Browser (no download) · Mobile · Official link verified Nov 3, 2026.
- Play free — itch.ioitch.ioReleased · PICO-8 version (128 × 128 pixels)Free
Plays in the browser on itch.io. No download.
Browser (no download) · Mobile · Official link verified Nov 3, 2026.
About Season Runners
Season Runners is a free pixel-art jump-and-run in the browser. You jump from block to block, collect items, dodge lava, poison, impacts from above and enemies, and try to get as far as you can, with the speed rising the longer a run lasts. The world is chosen by the date: there are eight worlds through the year (a carnival parade, a spring meadow, sun and beach, an autumn landscape, Halloween, a winter landscape, Christmas and New Year's Eve), each with its own character, backdrop, music, collectibles and enemies, so the game changes on its own as the seasons pass. Garages appear now and then; touch the door and you drive one of 15 vehicles (a car, a motorbike, a jet ski, a reindeer sled and more) over ramps for 10 or 15 seconds. Every world can be played in a classic 2D view or a 3D view, switched at any time. You can play as a guest, or sign in with Apple, Google or e-mail to put your score on a worldwide leaderboard, add friends and play Duo, where two players run the same level at the same time. It runs on phones, tablets and computers with touch buttons, keyboard or gamepad, in English and German. The developer says on r/aigamedev that it “is fully done with Claude code”, and the game's own pages say it was made with the help of Claude by Anthropic. A smaller PICO-8 version with the same eight worlds and 14 vehicles is free on itch.io.
How it was built
Partially verifiedIn a post on r/aigamedev (30 Oct 2026, UTC) announcing the browser game and its new two-player online mode, the developer writes: “It is fully done with Claude code.” The same post links the PICO-8 version on itch.io and the Lexaloffle forum. The footer and legal notice of seasonrunners.com say (in German and English) that the game was created with the help of AI (Claude by Anthropic), and the itch.io page says the same. The developer does not describe the workflow further.
- DeveloperLegal notice of seasonrunners.com: “Dieses Spiel wurde mithilfe von künstlicher Intelligenz (Claude von Anthropic) erstellt.” (This game was created with the help of artificial intelligence, Claude by Anthropic.) — seasonrunners.com (Simon Klever)
- Developeritch.io page: “Made with the help of AI (Claude by Anthropic).” The AI disclosure ticks AI Assisted, Code, Graphics, Sounds and Text. — itch.io
A browser game in JavaScript; the 3D view loads Three.js r128 and the accounts, leaderboard, friends list and Duo mode run on Firebase, per the site's scripts. The world is picked from the current date, and the 3D graphics scale down automatically on slower devices; on iPhone and Android the site can be added to the home screen like an app. The PICO-8 version squeezes the game into 128 × 128 pixels and the 8,192-token limit, with an optional 3D view in its pause menu and a local high-score list. The developer does not say how the art, music or sounds were made beyond the itch.io AI disclosure. The site's scripts contain no calls to AI services.
- Engine / framework
- Three.js
- Languages
- JavaScript, Lua (PICO-8 version)
- Team size
- Not disclosed
- Development time
- Not disclosed
- Development cost
- Not disclosed
- AI-written code
- Not disclosed
“It is fully done with Claude code.”Verification notes: AI use from the developer's post as u/simklever on r/aigamedev (30 Oct 2026, 22:04 UTC), read from the Arctic Shift Reddit archive on 8 Nov 2026, plus the AI statements on seasonrunners.com (footer and legal notice) and on the itch.io page, all re-read on 8 Nov 2026. “Fully done with Claude code” is the developer's wording; no share of AI-written code is stated, so none is recorded. The post was written for the browser game and links the PICO-8 version in the same message; the itch.io page credits Claude for both versions without saying which tool wrote the PICO-8 code. Developer: the Reddit account simklever and the itch.io and Lexaloffle account simoasis; the site's legal notice (Impressum) names Simon Klever (an IT project-management business in Germany) as operator and person responsible for the content. The post uses both “we” and “I” and credits the idea to a family member; no team size is stated. Features, worlds, vehicles, controls, accounts, Duo, the ad on the game-over screen and the languages (German and English) from the site's home, About and Help pages; the world dates from the About page. itch.io: published 25 Oct 2026, 08:42 UTC, updated 26 Oct 2026, 10:26 UTC, status Released, HTML5, rating 5.0 from 1 rating; the page lists Windows, macOS and Linux downloads “where available”. On 2 Nov 2026 the developer posted on Reddit and Lexaloffle that the world had changed automatically for both versions. The web version's launch date is not stated; the Reddit post of 30 Oct says “we’ve just released” it, so the release date given is the itch.io publish date. The site's scripts were searched and load Three.js, Firebase and Google AdSense, with no AI service addresses. The post had a score of 4 on Arctic Shift (observed; not a metric). The game was not played.
Development history
The PICO-8 version is published on itch.io (08:42 UTC), with a link to the web version.
Observeditch.ioThe developer shares the browser game on r/aigamedev, says it is fully done with Claude Code and announces the two-player online mode released that day.
DeveloperReddit (u/simklever)The developer posts that the world changed automatically to the next season in both versions.
DeveloperLexaloffle BBS (simoasis)
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.
Browser (official site)
Free in the browser with no download and no account needed; signing in (Apple, Google or e-mail) is only for the leaderboard, friends and Duo. The site's FAQ says an ad may appear on the game-over screen after longer runs to pay for the game.
No public metrics recorded for this listing.
Not publicly available: Concurrent players (site), Monthly revenue, Gross revenue.
itch.io
The PICO-8 version plays free on the page, with free downloads of the cartridge and an offline browser build (and standalone Windows, macOS and Linux versions where available).
Not publicly available: Gross revenue.
Sales & revenue (all platforms)
Browser game — there are no downloads to count.
Reviews & rankings
Not yet reviewed by our editors.
Sources
| Source | Type | Published | Accessed |
|---|---|---|---|
| Season Runners - platformer through all seasons- browser game (r/aigamedev) Reddit (u/simklever) | Social post | Oct 30, 2026 | Nov 3, 2026 |
| Season Runners – Jump-and-Run durch die Jahreszeiten seasonrunners.com (Simon Klever) | Official site | Not confirmed | Nov 3, 2026 |
| Über das Spiel – Season Runners (About) seasonrunners.com (Simon Klever) | Official site | Not confirmed | Nov 3, 2026 |
| Impressum – Season Runners (legal notice) seasonrunners.com (Simon Klever) | Official site | Not confirmed | Nov 3, 2026 |
| Season Runners by simoasis itch.io | Store page | Oct 25, 2026 | Nov 3, 2026 |
| Season Runners – a jump'n'run through the whole year Lexaloffle BBS (simoasis) | Social post | Not confirmed | Nov 3, 2026 |
| Official game page (language check) Simon Klever | Official site | Not confirmed | Nov 3, 2026 |
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