Here's some thoughts. I can't say yes or no for you, but I hope these questions help you focus the issue more. 1) Does your engine offer something over these o

Here's some thoughts. I can't say yes or no for you, but I hope these questions help you focus the issue more. 1) Does your engine offer something over these other frameworks that other people might find useful if you finish it? If so, I think you should finish it. But more importantly... 2) Are you more interested in producing your game, or creating your own gaming framework? And what do you stand to gain from each? (Even if it's just satisfaction and learning). 3) How much work do you have left to accomplish both? How does that compare to the work of starting over with a 3rd party framework?