yeah i thought there would be some mystery of time and space that i would be solving. I dont think the game is over though, they keep making new levels, 18 is just the latest.
One is on a bulliten board. One is in a drawer. The last one you have to use the snail mail to open the door. So think of a way you could copy a message and send it.
from what i remember you just want to get each corner (even though its a cirlce haha) to have the same colour so like one red one blue (whatever colours they were)