Please add a construction block that is cheap, has no purpose other then a space filler, and can be built on the side of other buildings. I like making setups were buildings bost other buildings, so it would be a huge help.
final note about challenge: all levels except 8 are possible, 8 is so close it might be possible if you have the best timing ever, give it a try if you want a new way to play this game.
 "The Final Earth 2"){kind=icon}
 "Sugar, sugar"){kind=icon}
 "Choppy Orc"){kind=icon}
 "Epic Boss Fighter 2"){kind=icon}