i coud say:
wtf its impossible to get graphics that good
omg i have experienced my new fav game
or if ur gonna make quests plz dont make a stroyline too
possible upgrads 4 bases:for desert enemys have 25 percent chance to have poisounous snake bite;for skyscraper -10 percent heat;for boat get 10 percent less enemys per wave; military base has + 5 attack 4 you;tropical jungle monkey allies insted of gaurds XD