Neal.fun is a collection of interactive web projects created and maintained by American developer Neal Agarwal. Since launching in 2017, he has used the single site to publish his own browser games and visual experiments, from the rule-stacking puzzle hit The Password Game to the LLM-powered crafting game Infinite Craft and the scroll-to-the-seafloor visualization The Deep Sea. Unlike a typical game portal, everything here is designed and built by one person: single-page, free, instantly playable, and often a parody of internet culture or a visualization of obscure data.

The Neal.fun homepage lists every project as a grid of cards, newest first

The homepage lists all projects in reverse chronological order. As of 2026-08-30, the newest entries are Wiki Spy, Cursor Camp, Sandboxels, Constellation Draw and Size of Life, all released in late 2025 or 2026 — the site is still updated with several new projects a year.

At a glance

  • URL: https://neal.fun/
  • Type: Collection of interactive web projects (browser mini-games, data visualizations, creative experiments)
  • Cost: Free, supported by on-page advertising and donations
  • Sign-up: None required
  • Interface language: English only

Background

Neal Agarwal, born in 1998, grew up in Fairfax, Virginia, and studied computer science at Virginia Tech. He has been building websites since age nine and started neal.fun in 2017 while still a student, using it to publish the web projects he wrote between classes. According to Business Insider, as cited by Wikipedia, his early project Spend Bill Gates' Money drew more than 80 million page views, and by the time he graduated the site's ad revenue was enough to support him full-time. He briefly worked at the creative company MSCHF before returning to neal.fun. The site is operated by NEALFUN INC., registered in Virginia (see the privacy policy).

His work is shaped by the Flash-era "Weird Web" and argues for a more personal, experimental internet. Beyond neal.fun, he also runs Just For Fun, a showcase of other people's creative coding.

Notable projects

The Password Game (2023)

A puzzle game released on June 27, 2023 after two months of development (The Password Game - Wikipedia). Players must type a password that satisfies 35 rules at once: it starts with "at least 5 characters" and escalates to digits summing to 25, embedding the day's Wordle answer, identifying a country from Google Street View, playing the best chess move, and keeping a chicken named Paul alive inside the password. Rules conflict with each other, so a single edit can void earlier progress. The game went viral on release day and had been played more than ten million times as of October 2023.

The Password Game: rules appear one by one as you type — green for satisfied, red for failed

Infinite Craft (2024)

A crafting game launched on January 31, 2024 (Infinite Craft - Wikipedia). Starting from water, fire, wind and earth, players drag two elements together to invent new concepts. Results are generated live by the Llama 2 and Llama 3.1 large language models and then cached, so the same pair yields the same result for everyone; the first player to produce an element earns a "First Discovery" badge. There is no win condition. iOS and Android apps followed in April and May 2024. A content filter blocks offensive outputs, but the AI still produces occasional nonsense — which has become part of the community's fun. Launch traffic briefly overwhelmed the site's servers, forcing Agarwal to petition his hosting provider for more bandwidth.

The Deep Sea (2019)

A scroll-based visualization released in November 2019. Scrolling down The Deep Sea means diving deeper: sea creatures, human dive records and shipwrecks appear at their true depths — Ahmed Gabr's 2014 record scuba dive at 332 meters, the Titanic wreck at 3,800 meters, and finally the Challenger Deep, reached by Jacques Piccard and Don Walsh aboard the Trieste on January 23, 1960. It remains a reference example of explaining one idea with a single web page.

The starting view of The Deep Sea: the scroll begins at the ocean surface

Other projects worth knowing

  • Spend Bill Gates' Money: a virtual 100billiontospend,froma100 billion to spend, from a2 Big Mac up to a $2.12 billion NBA team — a visceral sense of wealth scale.
  • Stimulation Clicker (January 2025): a clicker game satirizing information overload, which The Atlantic called "the worst page on the internet" (Neal Agarwal - Wikipedia).
  • Internet Roadtrip (May 2025): a collaborative road trip where everyone online votes roughly every ten seconds on which way to drive in Street View (FlowingData).
  • I'm Not a Robot (September 2025): a parody game built around CAPTCHAs.
  • Sandboxels (February 2026): a falling-sand simulator developed by R74n that moved to neal.fun through a partnership — a rare non-Agarwal entry on the site.

Accounts and openness

There is no account system: every project runs immediately in the browser, and there is no public API or embed SDK. Infinite Craft caches crafting results server-side so all players share one consistent world, but players never sign in. Some projects keep progress only in local browser state, so it does not carry across devices.

Privacy and content policy

Per the privacy policy, NEALFUN INC. uses Google Analytics and serves ads through third parties such as Google AdSense, which involves tracking cookies. The policy lists GDPR access, correction and deletion rights, and states the service is not directed at children under 13. This is a typical setup for a free, all-ages game site, but privacy-conscious readers should be aware of the ad tracking.

Good for

  • Killing a few spare minutes: most projects take no download, no sign-up and little time to grasp.
  • Classroom and explainer material: The Deep Sea and The Size of Space demonstrate scale intuitively.
  • Internet-culture commentary: The Password Game and Dark Patterns are playable critiques of password policies and manipulative UI.
  • Front-end inspiration: the interaction design of these single-page projects is frequently dissected in developer communities.

Limitations

  • English only, and some games lean on English-language context (for example the Wordle rule in The Password Game), raising the bar for non-English players.
  • Most projects are one-shot experiences with no saved progress, leaderboards or long-term goals, so replay value is limited.
  • The free model relies on third-party ads and tracking cookies, which privacy-sensitive users must weigh themselves.
  • Projects vary widely in type and polish, with no unified difficulty or tutorial design; some are closer to concept demos than full games.
  • A few projects depend on server-side services (such as Infinite Craft's AI crafting), and the site has overloaded under peak traffic before.

Similar sites

Few personal creative sites match Neal.fun's scale. For more work in the same spirit, see the author's own Just For Fun showcase (via Neal Agarwal - Wikipedia); R74n, the developer behind the site's Sandboxels, also maintains a set of similar browser experiments.

References