How destroy this building?!

Sorry, but to me there is no other title occurred.

I want to mark a target with the "pointer" sprite. The "Stone" sprite is

Shoot the selected destination. The building collapses.

How can I do that? Thanks for your help.

Here is the *.capx file:

dropbox.com/s/lv7toz3ypqorjkk/Demo.capx

Best regards,

Wossi

Ohh, i have a solution!

The name of this action called "Apply impulse towards position". Now it's works, great!