MonoSpace is a 2D platformer, based around the use of color. Platforms will appear if you have the right color enabled (example: you can't get on black platforms if the active color is white, etc.).
This is a project managed by a small team, N7 | Monoteam. The main dev is NextinFRFX (a.k.a, me).
This is an experimental project, but in theory it might come out around the year 2022 or 2023, depending on how big the game will be and how much people are interested, it was started in November 2020 so it's still pretty much in early alpha, but the basics of the game are more or less complete.