Please do not post the same thing multiple times. The board software automatically flags certain posts as needing moderator attention. This happens the most often for new users. I'm pretty sure this is made clear at the time you attempt to post. Posting the same thing over and over again just makes that many more posts the moderators have to weed through later. This makes us sad. Don't make us sad. If your post/thread doesn't appear, just wait a while. Don't post it again. If it hasn't shown up by the next day, then you can try again. I normally go through posts in the mornings, and try to check a few times throughout the day, but I'm not here 24/7. There will typically be a significant delay before posts are approved. Just be patient.
PRMac hits a great price point - it's worth giving it a shot, even if you can't necessarily track any specific ROI.
I played recently with PressKing - it's a self-serve PR database that you can pay-per-contact for. Their App database is a little thin, but it won't cost much either! :)
We've also taken a shot at sharing what we think are the most important pick-up points in writing and distributing a press release. (In case you choose to go-it-alone). I think there's a lot of overlap with @sylvainww's post above, but hopefully there's a few points in there that can be of some help..!
I would strongly recommend, if possible, to find somebody to work with - whether it be another coder, a designer (or both) - don't worry about 'sharing' rewards - 1/3 of potentially nothing is very little as @kkkkkkkk said..
The reason that I believe finding others is so important is that people lose interest and are disheartened a lot more easily as an individual than as part of a team - imagine spending all of your free time for the next year working on something by yourself, without anyone to push you forward, motivate you, help with problems etc.. It will also reduce the timeframe drastically. 3 people in 4 months is much more fun than one person in a year!
Here's an idea - @strictlyt - I don't suppose your idea is also a 2D side-scroller..? :)