College football, coached by you: a free single-player coaching career in the browser, with a quick-game mode where you pick the two teams, the venue and how much of the game you call yourself.
SimCFB offers a New career, a Quick game, a How to play page and a way to load a backup. In a quick game you pick your team and an opponent from conference lists (SEC, Big Ten, ACC, Big 12; the teams are fictional, such as the Texas Lone Stars and the Georgia Pitbulls), compare their ratings by position, choose a home or away game, and decide how you play it: call only the key situations, call everything, or watch and sim. Calling the key downs takes about 45 to 60 minutes; you can speed up between plays, skip or sim from the pause menu.
It is free and single-player. Saves stay on your device, and a backup can be loaded back in. The site shows its version (v0.2 at the time of listing) and notes that anonymous play stats, with no names or emails, help improve the game.
Cozy Aquarium is a free idle aquarium simulation playable in the browser and on mobile, with no sign-in needed. You begin with a single bubble and build up a pond or river filled with fish, frogs, turtles, crabs and plants.
A life simulator across twelve thousand years. Be born anywhere from 10,000 BC to the far future and live one year at a time in a living world of dynasties, migrations, wars and politics. Free, open source, one HTML file.
A multiplayer browser flight simulator famously vibe-coded in a weekend with Cursor and Grok 3 — now a full open world with other players, planes and chaos, reportedly earning thousands per month.
A cute 3D farming playground where you play a chicken: collect golden eggs, hatch chicks and explore a bright, chunky low-poly farm with classic WASD controls.
A Ray Vibe Awards honorable mention: rover racing powered by the setting sun — fast, smooth momentum in a gorgeous low-poly desert as daylight fades.
I made this game with the new Gemini TTS, it generates the voices from a description and has really warm inflection