Merge Battle Tactics

I enjoy the game with my son buy I reach a certain level and then the game seems to crash and I lose my entire army and can't continue as the enemy is too strong and I don't have enough money to build another army and then my army disappears again.

Interesting tactical merge game...with an ad after almost each click. Before battles, during battles. Played once. Uninstalled. Two stars only because I liked the idea at least.

Once you get to higher levels it starts putting negative coin values in