Thank for the hard work and game :3
An efficiency pass on the packaged game would eventually be helpful, I think. Some "low hanging" fruit is that the entire "Brushes" folder does not need to be included, which will reduce 600MB+ from packed game.
Other is mostly high quality textures, like 4K textures that could be reduced to less than 4K, for packed game. It seems like many things packed in game are also not used, like many different types of grasses from content pack, but then only use 1 or 2 types.