Fun game! Love the animations and graphics. If I'd change anything, it would be adding a visual effect when shockwave activates (either particles or a visual change to copper coins?) and smarter coin choosing for the little guys (it was a bit frustrating trying to increase my $/sec when my helpers were making eachother redundant). Also full stats for that adds up my upgrades, ie exactly what percentage bonus I get from x amount of "hard worker" upgrades.