What kind of game is Roundabout?

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I've moved on to the Direwolf20 modpack for Minecraft 1.10.2.
Some fairly drastic changes to my old favorite mods and some notable omissions from the usual list of mods.

It's forcing me to engineer outside of my usual routine, which is ultimately what I love about Minecraft, so all good.

Unfortunately, it doesn't run on my POS vacation lappy, so I'm playing Factorio when I need something familiar and comfortable to fill time. Factorio is fun, but I'm so new to it that I keep doing that thing where I build something and tear it down a few times before I'm actually happy with the design. Which is a bit more frustrating than I want on vacation, but it's all good.