I would bet the higher that price the less likely the sale and also the more likely the piracy. Charging even $5 for a game will likely drive your actual installs and sales through the floor. If you make a good product but most people can't justify paying for it, they'll just find an alternative means of playing it. Also the pump and dump industry in the app stores especially in gaming is another thing you have to worry about. You make a good game at a $10 price tag within a couple weeks you'll find your exact game with slightly altered graphics and a similar name that will be under cutting your price point. This used to be much worse, but unless you're a big studio like EA, Rovio, or King it's still a problem for you as a little guy.