I made this in like 20 minutes

Thats nice! Also we could change the top 3 leaderboard icons to something funny

That sounds good. I have a couple ideas for the top 3 but I'm uncertain how it would work because I have no experience with using the moderator tools.

I'm pretty sure you should do this:

Leaderboard --> Edit theme --> Icon.

Also the final size of the icon will always be 16x16 pixels.

Sounds simple enough. I'm not a mod though so someone else would have to do that.

Here are couple concepts I made