is there any way to cut/draw the house in first puzzle?

[mini ninja lover]

Seriously, is there?

[BMunchausen]

Hi there.

Yup, you use the brush to trace the fat lines and then click the knife icon to cut only on the thinnest rectangle surrounding the building. For the longest time I was trying to use the knife on the actual house but you need to use it on the faint line that's outside of the house.