Really no Linux version when it is one click? OK, your call.
It is not that simple. The engine I'm using is in alpha, it has many bugs on Linux. As a whole, getting games to be stable on Linux is a huge headache. As the sole developer working on it in his free time, I can't spend hours playing the game of "is it me or the engine" with the bugs, especially on a free game.
I want to release the game on Steam Deck but I just don't have the capacity to do that right now. Hopefully in the future :)