I can still remember my first build in Demo Blockland.
It was a Sprint Track with two jeeps and the tank. There was also a pool. I called it the Drive and Dive.
And my second build was actually pretty good.
I wanted to fight people, so i made a TDM battlefield on slopes, i only had 150 bricks so i could only make one base. When i got my key, I then made the other two bases.
I should host with this some time.