Dont be misled by the description of "80 levels" when you buy the game. To unlock them after the first 20, you either have to pay 99¢ per 20 levels ($2.97 total) or earn enough stars to do so. The trouble is that the levels get incredibly hard (almost impossible) by around level 30 and to unlock the last 20, you have to achieve perfect scores to get enough stars. This is impossible without paying more money for "barrels" to upgrade your units.
Either sell me the game and let me play it or be clear about this in the description. As it stands right now it is misleading.
Stow1 about Fort Defenders 7 seas