Thank you for playing.
There's no joke about the name, It's more of a stylistic cool name decision. It's basically always a cube.
If the drills were fast and weak it'd remove one (important) upgrade field, so I don't have an initial improvement idea. I could alter the visual state of the drills according to the speed though, I'll test that.
By "repetitive upgrade fields" do you mean upgrading damage, then upgrading damage again in another node? It's a pretty common trope in those games. And yeah the economy scales so you usually grab the earlier ones first.