Hey there!

There's plenty of things to do, as in any open project
Depending on what you'd like to do;
- Game balance testing is something we really need at the moment; game needs to be interesting and in balance prior to mainnet launch
- If you're a software dev, you can contribute; Mooo oversees the Git
- There's always extra bits and pieces to add, and for example I'm right now working on a "web app" interface to the daemon in R - basically almost as if a second client.
- General feedback, community engagement etc is very welcome.

We're right now looking into some major directions on where to go, when to pursue mainnet, what features are still realistic to think of, etc.
Naturally when the mainnet launches, any hashrate helps to make it stable - and this can be done merge-mined with Monero, so helps both networks.
That's from the top of my head, but I'm sure I've forgotten a lot of things. Discord, IRC, and in-game chat are where I'm actively communicating or responding.