Thanks for the advice, and you are right. I always try to focus on one game, but, when I see it works I feel comfortable enough to start the one I have in mind, and yes, I have a documento or a drawing, but I really feel the necessity to at list start the file of the game, just the empty stage, then in a free time I like to draw the sprites and that make me wonder about animation, so I animate a couple of sprites, ok ok a little bit of interaction... Nooooooo I did it again!
For my c1ic.mx project I'm developing 33 games at the same time, LOL So I finish one game once in a while. I'll try to focus more ;)