This Project is not difficult to handle. We need Help an almost every Area (Code, Assets, GUI, "Story", Ideas....).
You should first take a look here: Help & Instructions how to handle everthing here, there are even Videos that explain a lot: Tutorial Thread. You will see it is not too complicated.
And then you can look what needs to be done for the Moment. But of course, also you own new Ideas are welcome!
If you want to know what has to be done excactly:
- You are an good 2d Artist or Render-God? Take a look at the GUI Thread: Gui-Thread
- A good start would be the overal Project-Progress List here: [ TODO ]
- Or the Assets-List [ TODO ]