If you find an object and it goes big in your screen, just click on it to make it disappear. You may have trouble with one of the codes disappearing, but to get it back just do what you did again to view it again.
For all of the sound effects inside this program, (I lost count how many I actually used...) I used Pixabay Sounds. It's a free website where you can download sound effects for free to use in your next big (or small) projects.