The Imagine Café inside my head

Click on the coloured tiles below for short intros

Here's a sudoku challenge before you go back to the galleries. No instructions. Just look at the grid. I've filled in a few more squares. There's Mayan "chi" & the Egyptian hieroglyphs for "a" & "y", the vulture and the reeds, and the Spanish upside down question mark. I hope this doesn't give too much away


















































You have to guess what the rules are, then fill in the table accordingly. I'll be posting the solution very soon, so start holding your breath now