It looks interesting, but the Windows version doesn't start on my computer (Win10). It just prompts an error message about a missing SDL2.dll file and recommends reinstalling.
Sorry to say that, but it still won't load. The .dll file is there and running the .exe doesn't lead to an error message, but the game still doesn't start. It just does...nothing. Grid.exe is listed in the task manager for a second, then disappears again. Compatibility mode and running it as an admin didn't help, either.
I've also tried it on OSX 10.12. It wasn't really successful, but at least the terminal gave a little clue about what went wrong:
The red parts are mostly my user name, the only exception being the beginning of the third line, where my device name was listed. The last line translates to "process terminated".