I made a couple hundred CC levels back when I was ~7 years old (admittedly, most of those early ones weren't very good). Now, I haven't even gotten 50 levels made in the last five years. Part of it is that I'm not as interested in Chip's Challenge as I used to be. Also, I've become much more of a perfectionist since then--it's hard for me to sit down and create anything without worrying that it's not going to be good enough. But for CC levels, I feel like I just don't have the ideas in the first place like I used to. I guess that's probably because of not being as interested in it anymore--I'm not thinking about CC very much, so of course ideas for it aren't going to occur to me.