Online games for adults (so it's NOT for kids).
Should have a white background.
The logo should communicate: games, fun, excitement, fun for your brain (the site has brain teasers and mysteries to solve). It can be whimsical, different, unusual.
It should be fun to look at (the logo) - something that someone would see and they'd think "Oh that looks interesting, what is that?" The colors can be anything right now - probably more bright, but I'm open to anything. It will be used on the online website when it's finished.
It's called Challenge Hut because it's a House of Challenges (but house was taken for domains, so it's a hut).
Here is a page out of the website. I did it (so NOT professional) but it might give you an idea of the personality of the site:
Fun, whimsical, playful, exciting...