i personally havent goten hard but it seems extremely easy
just say screw to the other building and fully upgrade urs
and fire misles like crazy around ur building SPAM SPAM SPAM
for 1-2 push the block underneth to the point were its barley supporting the top one, then go to the top one and keep jumping at it and itll fall down causing no seppus to die
the car lvl was tricky but just start a line on the right of the circle and quickly draw UNDER the platerform and end it at the other side so it cant be budged and the car will roll over it