Great to know! I do agree with a tutorial, or at least something that gives a little more instructions. Like you know when you start a new game and it tells you like “Use these keys to do this action” or whatever, you could implement something along the lines of “Use keys ‘A’ and ‘D’ to move left or right”.
As for that UI artist, if he doesn’t get back to you, try coming up with a design in your head, look at other’s designs, and then try to implement it into your own new interface. I wouldn’t say I’m fantastic at making UIs, but I’m somewhat ok and I just kind of try different styles out and come up with something.
If you don’t fancy making the UIs on your own - which is perfectly ok - then I think I may know some people.
Have a good one! 
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