Thanks for playing.
Initially the idea was to call this game the Ultimate troll. The objective will be to basically mess with humans. So I was thinking of levels like abduct a cow, put it on a roof. Make crop circles. Avoid getting caught by star gazers and men in black. That is why initially, I made it to abduct cows as tutorial. And then later adapted this astronomy storytelling approach. I think ultimate troll could have been more enjoyable.
Not sure about the full sceen side of things. Itch. Io lets game go full screen in browsers. For it to go full screen as a standalone app. That would require some godot magic I guess. I am glad you were able to play on linux. I had no way to test for Linux and mac.
Anyhow . Thanks a lot for playing