A visual reflex test: five rounds of spot-the-different-tile against the clock.

Press the button and don't let go. That's it. That's the game.

Type A to Z as fast as humanly possible, racing the ghost of your best run.

The world's longest page. Scroll to the bottom faster than everyone else.

A sweeping marker, a glowing zone, ten clicks. Every hit makes it faster. One miss ends it.

A 45-second aim trainer with four themed ranges and career-long stat tracking.

A five-round reaction test against a traffic light that actively lies to you about when it turns green.

Read a historical clue, drag a slider to the year, and get scored on how close you land.

Five statements from the internet. Some are real. Some are confident nonsense. Sort them.

Six real statistics — one has a single digit quietly changed. Find the fake.

Estimation golf: multiply your way to wild numbers in as few strokes as possible.

One giant scrambled word a day, the same for the whole world. Four guesses. No mercy.

Twelve fresh puzzles, eighteen seconds each, one extremely flattering number. Zero science.

A turn-based ASCII space roguelike: mine, loot, craft, fight, and jump ever deeper.

Interplanetary courier work: drag, release, and let gravity do the driving. The parcel is not insured.

Mini-golf across nine holes of gravity wells. Par assumes you understand orbital mechanics. Par is optimistic.

Air traffic control, but the aircraft are satellites and the airport is a planet that wants to eat them.

Aerospace engineering with the contents of a garage. Stack junk, hit launch, measure how high the mistake went.

You choose one number: the entry angle. Then physics takes over and you watch what your number did.

Basketball by cannon, across five worlds with five different opinions about gravity. Jupiter's opinion is the strongest.

A protoplanetary disk in a jar. Dust clumps into planets over real hours, whether or not you're watching. Mostly not watching.

A pet black hole. Click to feed it, buy it upgrades, leave, come back to find it fatter. It is never full and neither are you.

Tug of war over a derelict space station, on a rope with spring physics and strong opinions. Up to 4v4, all of it about timing.

Zero-G sumo for up to eight ships: no brakes, no walls, a hungry sun in the middle, and a safe ring that keeps shrinking.

Two cursors, swords drawn. Swing with left click, block with right click — but shields are finite.

Blend into a crowd of emoji NPCs. Act natural during the vibe waves. Don't get clicked.

Race real humans through punctuation-heavy sentences built to break fingers.

Asymmetric typing chase: the Runner types to escape, the Copy Cat copies to catch.

A real old-school text MUD: one shared world, typed commands, sarcastic wildlife.

Real chess on a 5×5 board: rook, queen, king, five pawns, and two random minor pieces.

Head-to-head Cee-lo: classic three-dice ranks, stand-or-press, quick match or private rooms. First to three hands wins the table.

You and your friends run one paper company. Work the stations, ship the reams, beat a quota that only ever goes up.

Thirty seconds, one random prompt, one masterpiece for the public gallery.

Don't guess the right answer — guess what everyone else will guess.

Place one word on a shared canvas. Once. Forever. Choose wisely.

A persistent aquarium that keeps running while you're away. The fish have needs, and opinions.

A persistent lawn-care sim: grow a yard from bare dirt to a lush, mowable masterpiece.

One shared 128×128 canvas for the whole site. Place a pixel, wait out the cooldown, place another — together it becomes art, chaos, or both.

A Newtonian N-body solar system sandbox with real body data, time warp, and Universe Sandbox-style toys.

A real-time 3D visualization of spacetime curvature: a volumetric grid of space visibly displaced around masses, with orbiting bodies, gravitational-wave ripples, and droppable test particles.

A playable Doorways 1.3 desktop from another timeline. Doorway Manager, dial-up networking, secret Duh Prompt tools, DBasic EXEs, Mine-ish, Card-Alone, and a shutdown that finally counts your busywork.

You are given a rock. It does nothing. You may polish it once a day, name it, and eventually put it on a pedestal under a lamp. That is the entire game and it never ends.