I have received it.
Thanks, but...
First of all I had to mark the program file as an executable file for a game. Then I had to delete the .local/share/godot/app_userdata/Lumini Zen directory created by the demo version, otherwise the application will think I'm still playing the demo version. There doesn't seem to be an exit button in the game. Since I prefer to play in full-screen mode, I first switch back to windowed mode and then close the window. I don't think that's normal! The game doesn't make me as happy as I hoped, but it's not bad by any means. From about level 20, I notice a kind of disinterest. I was about to quit the game. I felt like it was always the same. It is quite conceivable for me that many demo version players lose their interest in the game at this point. Now I'm in level 27. And on the one hand I have the feeling that the game is too difficult and on the other hand that it is pure coincidence whether you make it through a level or not.
This is my third attempt...
And it won't work again!
I've already gotten used to the not really good distinguishability of the Color shades. But I also noticed that with yellow, not only with blue.
Let's see if I continue the game tomorrow...