Goood work! i think a limit of building, would add a bit of challenge = maybe everything you destroy, is 1 building point, but i like the graphics, and sounds and gameplay, i tend to keep falling ontop of enemies though.
Hey thanks for playing!
As I said below, I tried to balance the building with the presence of enemies. I thought of adding the jumping on enemies as a killing mechanic, but it could be too much like Mario.