I created a spaceship game, I need the small ship to hit the main ship and cause damage, I can't do that on the blocks, how can I make this collision? Please help me.
You can do that using several blocks together. 
Especially the section on Collisions. See Figure17.9 for an example. Instead of playing a sound, link to a routine that reports damage and provides code to tell the app what it should do? Subtract a value from a counter, hide the small ship, make a sound or provide code to do what you want to happen.