This game seems to consist mostly of clicking whatever widget has a green box and then clicking "Claim" to cash in various "rewards" that are doled out in a gazillion different types of currency or "points", each of which has to be used for a different type of levelling up, which itself require another set of clicks. There seems to be no real strategy to the game, as your choice of weapon towers is severely constrained, so you can not try out various combinations of weapons. Your only input seems to be a small amount of choice on where to apply upgrades and on which target to focus the prime weapon on during combat. Not recommended.