It's because of 2 reasons. One reason was that it felt way too outdated. I learned how sprite movement works, collision, and other stuff. Second is because I was forcing myself to work on Adventures of Stickman. I soon realized if I didn't enjoy coding or playing the game, what's the point of continuing?
Would you mind sharing the code? I pretty much know you might feel outraged to let someone touch into your code, however I wonder if I can continue. Maybe if you come to like it once more we could try a co-dev.
(May sound like a silly comment, but I'm desperate for a programmer colleague :S)