I'm normally not a huge fan of these games but I do feel that this is one of the better ones. There are flaws/annoyances like needing diamonds to repair items but the game overall is still well designed and addictive. In my humble opinion at least :/
It's very enjoyable and polished but I would like something like a rating for each level. Killing all the zombies with one bullet should maybe give more than just more points. Good though!
 "Big Head Bash"){kind=icon}
 "Pocket Creature PVP")
 "Heavens")
 "Lightem Out")
 "99 Bricks")
 "Hordes and Lords")
 "Red Ball 4 (vol.1)")
 "DDTank")
 "Zombie Shooter")
 "Overkings")
 "DONUT GET!")
 "Unicorpter")
 "Takeover")
 "simple solitaire")
 "Skyshard Heroes")
 "Plague of Egypt")
 "Papa's Pizzeria"){kind=icon}
Controls can be customized on the settings menu. See the cog icon on the menu next to the arrow/back button.