The graffiti that you see everywhere doesn't count as tiles. Cleaning it away gives you XP, though. So make sure to check each location for graffiti to get that bonus XP.
What is the energy cost and bonus in SUPER hero event.
Pick your region. Follow the chart.
BlameTheParrot link is not opening.
pixel_player92636540 This stuff that Diggy is standing next to.
It's all over the place and on different things, not just walls. The amount of XP it gives you for cleaning it off depends on the Region you are in. I'm in China and it gives 2500.
You may be clicking on these graffiti tikes already as they light up with a hand (at least in mobile that's what happens.)
Also, in Challenge 1, roll the sponge over all the star tiles while cleaning the green goop to get more experience points.
Does for me.
Don't know why it didn't open for you...Try going to the main WIKI page:
Then along the left edge is the link to the Events timeline...