Are you open to have someone else looking at the code and see how it can be improved, both from design and architecture perspective?
Even if he was open to sharing the code, I'm not sure how willing he would be to include someone else in development or improvement. Although I would not include anyone in this case. For example, after a while, you would get bored or simply wouldn't have time to continue with it, and he
LoyceV would have to fix yours in addition to his own code.