Drag and drop an Icon onto an empty polo to start a sound, drag down or press the "x" button to get rid of the character. Press the restart button or space to remove all characters. use the mute button to temporarily mute a character until its on a sound part you like, use the volume slider to control the character's sound to a volume you prefer.
feel free to put this in studios all credits are in the project this template uses the improvised incredibox template just a bit old version, here's the template below: https://scratch.mit.edu/projects/1113460854/ also I found the intro in a remix of the template, prob was in a very old version of template