Seeing as the demo just started, i think that its only fit that i would ask what everyone's favorite build they have made is!
my current favorite is attached, it was the first one i made and i still like it the best ^^
its entire purpose is to mine into the planet core and use its missiles to take out any alien bases from bellow, its not perfect and all applicable, but its very very fun to use when it works!
Edit: if you're wondering why it looks upside down, its because the direction thing is a little wonky and im too lazy to rebuild it to work the other way, as that would make it so i had to flip my entire build.
