"Coal Mine" is a fun game!
After registration you will receive a free level which gives 250 Satoshi per hour. Collect the coins and invest them in the construction of underground tunnels. Help a miners collect coal in a tunnels and earn extra income! More you can read in the section "How to Play".
Tell your friends about our game and get a bonus! It is so simple! Leave your referral link to the thematic forums and social networks. Get a 5% reward for all purchases of your referrals!