Hi,
I'm a bored physicist and I'm developing this game. It's a 4D puzzle in very early development. You navigate a 4D world and are able to rotate your 3D slice. It is and always will be free. I also plan a level editor.
You can now play a small demo, until you wait for alpha to come out. You can play in-browser on windows or standalone win/linux.
http://rantonels.itch.io/tetraspace