I havn't been using game-editor much, but the main reason is simply because I do not know what to make. I tried making a platformer, but I found it to be a very generic game with overly-complex controls, so I've scrapped the idea. the thing is, I don't know what to do instead. all my other ideas are too big to attempt with my tiny amount of experience.
Ok you said a platformer is it a run and jump or hack and slash? If you dont know certain codes just let us know or look at some demos. I recently put out a couple check them out and if you need to know something just ask . If I dont know the answer Iam sure others will.
you then have all the images, sounds etc already done, you know how to work on the level, and it gives you the motivation to work more on it, since you already see the finished product