Here you go, my first ever AutoHotKey script.
Install: Just run the exe
Usage: Press Escape to exit
and as requested
Left Click - Play/Pause
Right Click - Stop
Scroll - Volume Up/Down
Now, because I don't have a fancy mouse I couldn't test previous/next track, but I've assigned them to Mouse Button 4 and 5, so I'd be interested to see how you go.
Have fun.