Regular nail polish remover should take it off the tile. Just make sure to mop really well afterwords.

I would think it would work on the wall, too, is it just regular plaster/sheetboard? (ie. a normal wall). I'd get as much off as you can with that, and then buy a "Mr. Clean Magic Eraser" (I promise I'm not stealth marketing). They really are magic... that should take care of the rest.