Olli!
Looking good!! I think you've done a nice job with your pages! I didn't see anything posted which would cause legal concerns. You've linked to the other sites which might have been of concern had you tried to copy them, so you should be fine!
I would suggest that on the W&W gallery pages that you downsize the opening game picture a bit to save loading time and perhap omit it from the second gallery page entirely.
On the MTG page (which I realise is under construction) I was a bit confused that clicking the names of the card groups only scrolled you to the list of cards for that group. I guess I expected to see pictures of the cards and perhaps that is what you have planned. I'm also used to seeing "links" highlighted differently than the rest of the page so it was not obvious to me that I was to click on the "group name" and not the individual card names!
Silly me, but I did figure that out.
You've done a nice job! The site is nicely laid out and easy to navigate and I have to compliment you that you're doing this in a second language! Good job!!
Wyv