@basjak - Never even passed my train of thoughts trying to sell anything I write. I'm more of a hobbyist. Maybe sometime I might start a big project, I've a good idea for one.
@Pincho - Out of the two you've posted it would be more likely the Star Wars one I'd have a go at. Those were the good old games. I'm going to have a look at google and see what sites I can find for old classic games to have a blast at making a remake. I may even team up with someone to get the next remake looking more classy. As you can see from the source code, all the main elements are split up into there respective files. A habit and worth while practice for anyone.
What I usually do before ploughing straight into writing a game is to pull out the elements that will need some work. In the bike game I had to toy around with the endless terrain and then come up with ideas for a super fast collision method.
Youtube was a great source for getting the ideas together to quickly put together the 3D Motor Chase game. It had videos of the original game as well as videos of a remake on the iPad, which didn't look very playable at all. That gave me the inspiration to do a version that was more fun. I put graphics aside for better game-play.
Mental arithmetic? Me? (That's for computers) I can't subtract a fart from a plate of beans!
Warning! May contain Nuts!