Atomic Petting Zoo

Independent games with arcade roots.

Atomic Petting Zoo is a home for independent games by Kevin Mitchell. Currently in development: Pachinvaders, a mix of pachinko and Space Invaders.

In development · v0.1.41

Pachinvaders

Pachinko meets Space Invaders, flipped upside down.

Drop balls through pegs to stop enemies reaching your core. Choose cards as you go, fight through five worlds, and spend your credits on upgrades for the next run.

Play Pachinvaders

Play in your browser, or download for Windows and Mac.

Pachinvaders gameplay: shots ricochet through blue pegs toward pink square and yellow circle enemies.
Five worlds. Nine waves and a boss in each.

Development notes

The latest build is all about the boss. If something feels off, leave me a comment on itch.io. It helps to know your platform and the world you reached.

What changed in v0.1.41

October 9, 2026

  • Its armor is shielded. Balls ripple off it and break on a second hit.
  • Breaking a weak spot sets off a shockwave that clears your balls off the board.
  • It jumps forward now, slamming down and pushing balls away.
  • Beating it sets off a bigger explosion in the world’s color.
  • The version label no longer says demo.

Runs suspended in v0.1.40 or earlier won’t carry into this build. Your upgrades, credits, Player Rank and unlocked worlds are kept.

Release page and downloads

Earlier experiments

Cellular Barrage artwork

Cellular Barrage

A game-jam prototype about defending a bloodstream with ricocheting shots. Made for the GameDev.tv Game Jam 2025, it became the starting point for Pachinvaders.

Play Cellular Barrage

Project Mach V

A weekend racing prototype: winding roads, traffic to dodge, and a rival to outrun.

Play Project Mach V

About Atomic Petting Zoo

Atomic Petting Zoo is a home for my independent games. I’m Kevin Mitchell, and I grew up playing arcade games. Pachinvaders is the one I’m working on now. It started with Cellular Barrage and keeps growing with help from people playing and sending feedback.

Find the games on itch.io and follow development on Bluesky.