What are some hints for how to check if a mouseclick is inside of a circle in the window?
You can check the location you are getting from the listener to the location of the circle and compare that.
If you make a simple distanceFrom funtion (or just put the diatance calculation in each time) you could compare it the getCenter and getRadius circle methods. dragon_game from project 3 has a distance function at the top you could probably recycle.