The game was fine, but not very fun to play. There was no sound at all, which greatly brought down my experience. It wasn't very straight-forward either, because right in the beginning I was thrown into countless zombies which... I couldn't even kill without grabbing all the five coins super-quickly and grabbing the damage upgrade before the enitre hordes came. A tutorial would therefore have been very useful, and it should have been a lot easier. Sounds are basically necessary for this type of game.