This is a joke game. Not a game that is funny, but a game that is deliberately a joke on its audience, made because the creator was angry that so many crappy games were being approved on Steam Greenlight, so they made a crappy game to get approved on Steam Greenlight.
This is a "clicker" game taken literally; the only way to get money in the game is clicking. There's no way to gain more money per click, though, nor is there any way to gain money while idling.
This is a bad game, but you can get 12 achievements pretty quickly in it. That's about all there is here, though.
.5