Thor : War of Tapnarok is a pretty fun casual game where you play as Thor, the god of thunder and strength from Norse and Germanic mythology, and try to kill all the monsters that want to put an end to humanity as we know it.
Gameplay in Thor : War of Tapnarok is very simple. All you have to do is tap on the monster's body and Thor will hammer hits in its direction until it falls, defeated, and is replaced by another monster. After you've killed a handful of monsters, you'll have to kill a boss (who's a little stronger but not by much) with your hammers. Each hit produces coins that you can invest in a better hammer for more damage, helpers, or special hits that will help you inflict more damage more quickly.
One of the downsides of Thor : War of Tapnarok is, possibly, its absolute lack of a challenge: the monsters can't harm you and there's no need for a strategy, since all you have to do is tap. If you tap harder, the monsters do die faster, but the only aspect of the game that changes based on your skill is how long the game lasts.
That said, Thor : War of Tapnarok is a simple but fun game with excellent graphics.
