I downloaded Happy Wars, too. It's kinda cool with the towers and all them skills you get.
The servers suck though, but I think there was an in-game message that said the servers are being worked on.
I'm not even that high of a level and I just get crushed by guys who are higher than me most of the time.
Plus,My teammates tend to all pick one class (Warrior) and we end up losing because no one wants to build anything to knock down the enemy's door.
But blocking sure helps just cause it's so darn effective.