I have been playing for quite a while but no luck
You are supposed to find 4 coins out of 25 blocks where 12 are bombs.
You get 3 lives and the chances are 16.9565% for each losing bet.
I am just having a dumb luck or something is up with this game
AFAIK the mines game is under the category of provably fair games provided by Fortunejack so logically it should be provably fair where you can verify your bets and I do believe it is really provably fair as Fortunejack wont risk their reputation by offering fake provably fair games. Dont you find any information of the fairness while you were playing?
Mines game sometime sucks indeed as you may get the bomb in the very first pick when you play with low number of bombs or you get the bomb on the last click when you plan to stop after it.