A downloadable game for Windows and macOS

You and your twin brother are exploring an abandoned portal factory, but he is much further ahead than you. Gotta catch up, but be careful - these portals look dangerous, and you have no idea where they'll take you, or what they might do to you. Avoid them at all costs... or try to go through all of them - this is your adventure through the abandoned portal factory, experience it however you want!

The game is played with a single button, which you hold to aim your jump, and release to jump in that direction (for more control mid-air, you can press the button again to double jump, which gives you a little boost and slows you down horizontally).

This game was created for Global Game Jam 2018 (Transmission). The player sprites for this game were created by 24 of the jam's local participants. One person would draw a spritesheet based on the original spritesheet, and then passed (or transmitted) their spritesheet to the next person, who created one based on that.


Hold space bar: Aim jump
Release space bar: Jump
Press space bar mid-air: Double jump
(Any face button on a gamepad or the Z/X/C/V/B/N/M keys can be used instead of space bar)

Esc: Return to title (Quit if on title)
R: Restart game
A: Toggle antialiasing
F: Toggle fullscreen


Writing, code, and environmental art by TJ Cordes (me)

Music by Toby Thompson

Character art by the following Buffalo Game Space GGJ18 participants:

  • TJ C.
  • Hussain H.
  • Wayne K.
  • Arsenio C.
  • Toby T.
  • Mark Z.
  • Jayson K.
  • Mark M.
  • Futch
  • Doug
  • Anthony S.
  • Gregory G.
  • Dan S.
  • Kendall
  • Alana
  • Hello CLD
  • ThatScrub
  • Katherine S.
  • Dale S.
  • Devon A.
  • John D.
  • Kevin
  • Naltroc
  • Shannon Z.

PlatformsWindows, macOS
Rated 5.0 out of 5 stars
Authorkyatt7 [Impostor Cat Games]
Tags2D, Global Game Jam, Hand-drawn, one-button
Average sessionA few minutes
InputsKeyboard, Gamepad (any)
AccessibilityOne button

Install instructions

Windows: Open APF.exe to play game

Mac: Open APF.app to play game


APF Windows.zip 15 MB
APF Mac.zip 45 MB


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Hey, thanks for making this. I love how gentle failure is (despite it being a bit frustrating in a Getting over it kind of way. Y'know, the good frustrating.) I also love the tension of trying to proceed vs. seeing what all the different characters are. And even though I've played through twice, I kind of want to figure out an optimal path for a speed run.

Yeah, the last day of development of this game was mostly spent trying to get a sub-minute run on it. Although, that was a 0% run - surely, there's a faster any% route, but I haven't looked for it yet.

Lovely project. And really nice to see all the various player models. :)