best game ever. its really great. i survived 24 waves...the waves take like 10 minutes after 13. overall i loved it....it was very hard but i had a strategy that made me win super awesomely. i had to repair every now and then and replace destroyed buiildings, how i lost was i always repair and replace and rebuild like every 10 min since my troops are great, but then i left for a hot dog and i forgot about them soo....ya..... here is a hint on winning.
make 3 generators, and miners. send your first 2 marines into the enemys yellow field, then when they cant handle it, make more MARINES. i had the whole feild mined out with 4 miners. once everything is mined, make snipers and giant artilery.
Front line:1 missle turret
Second line and on: 5 giant artellry and 1 house, and thats abkout it. oh and also put only snipers on feild. and scatter then around your base, like 1 next to each building.