A clown hero is a great idea. My first thought was that a more darker evil themed clown would fit better for the games aesthetic and world. More like the Joker or Shaco from League.
Binding scoreboard or extra info to mouse 4 or 5 to quickly buy skill upgrades doesn't behave like other keyboard buttons.
Sometimes it toggles the scoreboard/skills view and sometimes it just shows as long as you hold like a keyboard button, shouldn't the behaviour be the same?
Thanks