Clever and somehow fun, but too repetitive to go through the end.
It wears out too quickly however. The missions are very repetitive, you do exactly the same over and over again, mission after mission. And maybe I would live with that if it wasn't for the scenery, which never changes, like NEVER...
I was able to endure it for about 4 or 5 missions - until unlocking all the gameplay elements (which are gradually introduced to you mission after mission). Then it got too boring and I dropped it.
If it was just 5 missions long, I would give it 7 - 7,5. But it's too long for the level of variety it offers...