JPJani Penttinen
Playable work

My Games

Arcade roots, console launches, retro physics, and the path from the Finnish demoscene to AI-native game creation.

2026: New releases
Out now on Steam

Squall Riders

Jet-ski racing where every swell is a ramp.

Launch off storm waves, land tricks to charge your boost and outrace four rivals through three storms. Then take on Stunt Park, Splash Ball, Slalom and Big Wave, earn Spray and build your own ski in the garage.

RacingSportsArcade
  • Coming soon

    Trick or Roll

    Tilt the world, not the ball.

    Guide a golden hamster in a glass ball across 30 floating Halloween stages: plank walkways, spinning scarecrows, jack-o'-lantern bumpers, conveyors and launch ramps. Grab the candy, beat the 60-second clock and roll through the goal before you fall off the world.

    PlatformerPuzzleHalloween
  • Coming 5 Nov 2026

    Cabinet Fever

    Run an arcade from 1972 to 1998.

    Buy cabinets, set the prices, keep them repaired and play every one of the 31 machines yourself: each is a real, playable game. Grow from a corner nook into a neon megaplex as the years roll by.

    ManagementArcadeRetro
Open source

Las Vegas Strip

The real Las Vegas Strip, rebuilt building by building for the browser.

Walk it, drive it and go inside: 6,162 buildings, the resorts modelled from public references, and hotel rooms, casinos and shops you can enter. Almost a hundred million triangles. With every hotel floor built out, close to a billion. Built by AI agents on the Bitmagic engine. Free to use as the setting for your own game.

buildings
6,162buildings
detailed models
604detailed models
hotel rooms
30,692hotel rooms
triangles, fully built
~1Btriangles, fully built
2026: Play in your browser
2023: Guntech 2 available for Xbox, Nintendo Switch, Steam and Atari VCS
TransmissionGuntech 2 launch trailer Video Player

For more information about Guntech 2, please see the product page here.

You can also grab a copy of the game for Xbox Series X|S and Xbox One right here, or Windows, Mac and Linux in Steam.

Guntech 2 is also available for Nintendo Switch!

For more information about my current games, please check Bitmagic. To learn about my 30-year history as a game developer, please check out my blog post here.

The following video documentary by Atari Legend details the history of my first game, Utopos from 1990s until today!

TransmissionUtopos – Atari Legend documentary