Looks great, with simple but engaging mechanics. Some settings and metrics are not explained and I still don't understand what they mean. Levels get harder either because of bad guys are stronger or come in quicker waves, or the islands are harder to defend.

However, after a while you reach a groove and even with multiple squads to manage the game could really do with some additional level of complexity. So close to a 5 star, with just a little more variation.