Definitely not intended! My apologies. On re-reading it, it doesn't seem demeaning at all to me... but that's just my reading of it. I'd like to improve... what specifically seems demeaning to you?
As a random bystander it also reads as potentially pretty dismissive to me. Some points:
You only note negative things, not positive things. This colors the whole post.
You use italics and "Oh,", which makes it more conversational, and it sounds exasperated to me.
Your questions at the end could be construed as rhetorical, rather than constructive, partly because you suppose an answer.
Suggesting that the games that are there exist because they are "easy to program" could be seen as a negative comment on the creator's programming ability or drive.
As the poster of this link and someone who enjoys the games a lot, I think your criticism about lack of variety is valid (if out of place for a collection of free games) and your phrasing wasn't aggressive or anything, but the above are some points that I watch out for in my own writing, particularly the first one - even if I don't like something, I find it useful to point out positive aspects to make it clear I'm trying to be constructive.
