itch.io

The world of the games being what it is, making new tech is largely impossible (unless you're Towerfolk) because the fabrication capability just doesn't exist. Even if you knew EXACTLY how a certain simple integrated circuit worked IRL for example, and the whole manufacturing process, if you were hurled back to the middle ages, you wouldn't be able to make it, because you couldn't even make all the precursors to it. 

What CAN be done is salvage and repair, and the upside is that there was so MUCH made before everything fell apart that there's plenty to dig into in terms of spare parts. So that's what Scratch does, and did before meeting Mezz: Junkers dig things out of the ruins, sell them on to people like Scratch, who then repair them and sell the working items for a profit. It's a little like those guys that buy busted game consoles off ebay for cheap and re-sell them once they're working and cleaned up.

Pairing up with Mezz gives him protection of course, and the chance to assist with something beyond just survival, which he enjoys, but he still does the repair work as well.

But what does he do for fun? Well again, tinkering is ALSO what he does for fun; trying to recombine things in new ways, digging up obscure tech info, trying to understand random things the junkers find that he's never seen before. The work side is limited to things that are in demand once repaired, but the fun side can be more eclectic and wacky, experimental. He doesn't just repair, he "invents", in limited ways.

Outside of tech though? He doesn't get out much. He reads for one: mostly whatever data files he can get his paws on, fiction or non, but also actual, physical books. He only has three so far; real books were rare antiques even before the City fell apart. But he enjoys what he can get. He also plays/composes music on synthesizers and weird electronic instruments he cobbles together.