Game Off

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An upside-down yellow duck walks along a ceiling beside the words Flip Gravity.

How to flip gravity in a Phaser 4 platformer

Build a two-room gravity puzzle in Phaser 4. Give the player reversible gravity and make floor and ceiling collisions work with the same button.

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Game Off 2026 banner with a gearstick, Shift key and the theme Shift.

Game Off 2026 begins with the theme Shift

4th November 2026

Game Off 2026 is open with the theme Shift. Explore ideas, rules and the December 1 deadline for GitHub’s month-long game jam.

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Github’s November Game Off 2024 started

4th November 2024

It’s that time of year again, Game Off 2024 hosted by Lee Reilly and Github under way! This game jam is the perfect opportunity for developers of all skills to build and share their creations. Solo developers and teams; large and small, are welcome to join this month-long challenge. Github…Read…

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GitHub Game Off 2023

2nd November 2023

The GitHub Game Off 2023 competition organized by Lee Reilly just started on Itch. You have a whole month to submit an entry on a given theme: SCALE – check out this blog post for more details. As always, you’re welcome to interpret the theme however you like. You can…Read…

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Game Off 2022

22nd November 2022

The yearly Game Off competition organized by Lee Reilly from GitHub is slowly coming to a close, but you can still join if you can spare a few days for development, since it’s running for the whole month of November. The Game Off 2022 competition is hosted on Itch.io, and…Read…

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GitHub Game Off 2019 has started

6th November 2019

Game Off is an annual month-long game jam (hackathon for building games). This year’s theme is LEAPS AND BOUNDS. You’re welcome to interpret the theme however you wish. Maybe the year 2020 will lead you to think about hindsight being 20/20, and that’ll inspire even more ideas around time travel,…Read…

How to flip gravity in a Phaser 4 platformer