Bitcoin Clicker is a game in the genre timekiller-clicker, in which the main objective is to earn by clicking on the icon of the bitcoin how much money to buy a videocard that will increase the amount of $ per click.
Videocards can be improved, thereby increasing your earnings. Every 5 levels the price of the next increases several times. Also videocard can be overclocked, which gives you increasing bonuses for pumping.
The game has a store where you can buy videocards and improvements to them.