I would like to say that your ‘friend’ did not want to give you anything for your work. I would love to help you, but am currently working on my first game! I have no knowledge in coding, or knowledge in designing. You can check out my work here — > www.realitygamesllc.wixsite.com/realitygamesllc/reality-drive
Hopefully you have everything sorted out by now! If not, I wish you the best of luck. Currently, I am redoing my game’s city because the models were not mine. The city is being redone by me.