It's up to you what you want to do with your time. I mean Richard Heart's HEX has shown there is demand for a VAL/GLI style "locking and staking" model ($4mil to $1bil+ in not even 2 months), but of course there is a LOT of fishy stuff going on with that project.
You would need the developers to actually make/create the token, but you could try to have VAL/GLI be another attempt at an "Auroracoin" style system, but this time legit and also focused more on Nordic/Scandinavian area or whatever you want.
I don't know how you would be able to have the 2 currency system of VAL and GLI under ERC20 smart contract or even if ERC20 smart contract is what you want to go for design-wise.
Just don't worry about a game or anything more complicated unless there is a deeper idea there. I mean the only person who owns a ton of useless KotD game crap is me
I mean, I guess my 77,714 PEAs, 2,082 QUA1s, and 930 MIN1s will be happy to just exist in cyberspace for all eternity without any tasks to do. Perhaps the free time will allow them to experience their own Great Awakening and they can start ascending upwards from whatever dimension data table entries start at