Click on the saucer-like ship (the mothership) on the left to deploy fighters. These fighters will follow your mouse pointer. If you hold down space will you are clicking, you will get five fighters at a time (though they will come out all scrunched together). If they get scrunched together (which they inevitably will), press 2 and they will stop following your mouse and attempt to separate. If you have a lot, just acknowledge that they won't all separate. Once you think they are separated enough, press 1 to have them resume following your mouse. You can always get more fighters from the mothership. If you get too many (which is easy), just hover your mouse over one of the fighters and press the up arrow. Have fun!
This is my first game in the new version of Scratch, so its very basic and somewhat boring. Later, I might add an enemy mothership and combat etc. I was itching to make something with the new cloning function, and this is the result.