Censorship is saying you can't say or show a thing. Saying "Don't do this on my property" is not censorship. A contest host is allowing you to set up shop and offer your game on their site. Why wouldn't they have the right to stipulate the type of content?
If anything saying no obscene language and no NSFW content is more akin to "The theme this year is Meeting Strangers". What's the difference between those two? They both restrict the kinds of things you can write about.
It's like the kid that asked me "Why can't I stand up on the school bus? I thought this was a free country?" To which I answered, "You're right, it is a free country. You're free to walk to school all you want or to have your parents drive you. This bus is a courtesy to you and your family and when you get on, you agree to follow the rules of the bus."
Damn, my project "Meeting Strangers at Swear-fest 2015" goes down the drain!
I'm with Onix on this one. I don't see that rule as censorship. The games will be featured on their site, and maybe they care about a young audience or whatever (Kyle also expressed his personal reason). I, personally, don't think it's that big of a concern.
Yeah, I really wanted to use Go Big or Go Home, but truthfully I felt that something that was unexpected would produce more organic results. Besides, 1km1kt is really where I expect most of the participants to come from, and I didn't want people planning too far ahead.
Just for fun I made a little entry myself (which I'll put up on the day that the 24-hour competition ends, so as not to bias the results, since I obviously can't win a competition I'm running). It's very different than anything I've made before, which is fun. I went seriously experimental with it, and it's not my usual cup of tea.
Kyle, Head Honcho of Loreshaper Games
I write frequent on game development, storytelling, or life in general, in case you want to follow what I'm up to.