Wow Game's title describes itself excellent, I liked it, and even more the gameplay and design. I generally like survival games like this mixed with Rogue-like genres, so it was good for me.
In general, I will rate it like this:
Gameplay - 4 stars out of 5. Design - 5 stars out of 5. Music - 5 stars out of 5.
I think everybody should try to play in this game.