OS99 GAMES

How it plays

Every level runs on the same clock. When the countdown hits zero, down becomes up and the ceiling becomes the floor. Everything that was falling toward you starts falling away.

Nine connected sectors, each adding a new mechanic on top of what you already know: gravity-locked blocks, crates that fall with you, pressure plates and timed gates, swinging pendulums, time shards that change the countdown itself, lifts, magnets and boost rings, enemies that hunt you the moment gravity flips, and a run through bombs and boulders. Nothing is explained twice.

A first clear takes about 45 to 50 minutes. I made it with Adeeb for the GMTK Game Jam.

Screenshots

The player swings between two spiked pendulums in a dark cave.
A sector with a row of floor spikes and gravity-locked blocks.
The player standing on the ceiling after gravity flips.
The title menu, with the player beside it.
The sector select screen.