This is a game with a great concept, great theme, and fun mechanics.
However, after some time it begins to wear thin, since there isn't really a huge amount to do other than build your base and allocate resources for missions. You change islands once (or twice), but basically the gameplay doesn't change after the tutorial. Sure it's fun unlocking different traps and machines, but after some time it feels like a bit of a grind.
Recommended for a few quick plays, rather than a long sitting.