It is a lovely game where you are a bird that flying around an island BUT there is nothing to do in it. You can go around and try to find triangle gates that change the bird you are flying (there are also round gates I could not figure out what they do), but that is literally it so it gets boring after 5 minutes :( It is absolutely not worth 9,75€.

To get it to work on Linux I had to use Proton version 3.16-9 otherwise all I would get is a white screen. But it is very likely it works fine again from version 5 on.

Be a bird. Fly. Relax.