Hm where do I start, so far thx for the comment, seems that I haven´t made much wrong if the only real improvement is using imports.

And yes it is a "standard" playable swamo and regarding the horizon and sky there is not much to se due to the angle.
About the first point I must say its kind of challenging using no imports, I must say I am a bit bored about the Utm. Its like a kid living in candy store which could have its candy every day, whenever it wants.
I am not going to prove anything, cause it has already been proved that there are people who could do awesome stuff with or without imports.
And you are totally right many people fail this attempt, but there are also people who create "horrible-designed" maps with imports.
Anyway will work on that "standard".