Ask HN: Sudoku Island, launching my webapp. What to do from here?

http://www.sudokuisland.com After countless hours of loving labor, I'm finally ready to release this off my hands. I'm really excited to share this on HN and can't wait to see a response. I'd appreciate any kind of feedback, whether it's technical, design, or launch strategy. What would you do from here? My main problem now is that my app doesn't have much content, nor am I interested in constantly writing content, so it is difficult to get ranked in Google. To that end, I created a widget others can put on their site or blog to get links. I also added share buttons upon puzzle completion. My goal for this site is simply to rank on the first page of Google and run by itself as I move on to other projects. Lastly, how do I compare to an industry developer? I come from a different field and taught myself to code. Am I good enough to look for a junior role? Thanks HN!