Insecurities

I seem to be getting to that time in the Raiden Legacy development cycle where I wonder if I should start again.

Obviously the argument against this is that I should wait and see how I improve; series always look a lot better as they go on (have you seen the early Penny Arcade? They've come a hell of a long way) but the fact remains that I want to sell this series so I can do it full time. The fact remains that I'm not convinced that it's at a professional standard.
No bodies said that it's bad, but I haven't heard all that much that it's good either. It's difficult to tell if I'm leaving an impact.

I'll ask around my friends to see if I can get a better reading on what people think before I act rashly, but I don't want to continue with something that people are going to pass over.

Please, tell me what you think.