How do you make the BAD agents stop hitting you on spy island

You have to become invisible, using the Chameleon Suit. You get it from Doctor Spyglass, at Spyglass Eyewear, who secretly does research for the spy agency.

To let the doctor know you have been sent by Director D, you ask for an eye exam. During the exam, select the REVERSE of each symbol that he points to (Upside-down, or right-to-left, M instead of W, etc.). He will let you in the upstairs laboratory using the outside door.

Once you are inside, click on the doctor and he will tell you about his his lastest invention (the chameleon suit). The "chameleon suit" allows you to blend in with your surroundings. He will give it to you, and you can use it to slip past the guards and dogs at the docks. There you can rescue the first missing spy.

*To put it on or take it off, simply click on the "Items" button (the bag in the top right-hand corner of the screen) and select it.