Great concept and nicely done!
Windows version is running nice, taking ~600mb RAM with almost every upgrade maxed.
I'd add some tab, page or whatever to know how much money I get from each coin and stuff like that.
Also, here's some upgrade ideas: bigger click or hover area, better odds to land on tails, increased shockwave area.
And maybe adding spells, random or with cooldown. Like having a shockwave with your cursor, increasing money earned for a limited time, or doing some gravity vortex so you can click a lot of coins at the same time.