I'd rather him resurect that space game that was teased a while back..
The premise was something along the lines of the sleep timer had a byte overflow error or something and instead of sleeping 10 years, it ended up sleeping thousands...
He could also use his money to fund promising game studios like RocketWerkz to build the engine for that game. Kitten Space Agency has a bit of a problem with end game content. To this day you can play KSP1 if all you want to do is manual control of spacecraft, but lategame you want to launch multiple space craft simultaneously, which means they need to be autonomous.
The premise was something along the lines of the sleep timer had a byte overflow error or something and instead of sleeping 10 years, it ended up sleeping thousands...
( Edit for spelling I hope )