I love the art and theme of the game. However, the random number generator seems to be unrestricted, and it seems to make pretty impossible situations rather often. :-/
Learning curve is way too high, or maybe there are just too many choices in weapons, and it's not completely obvious until you buy it that it is useless/useful.
 "Glean"){kind=icon}
 "Kingdom Rush"){kind=icon}
 "Walkinator"){kind=icon}
 "ImmorTall"){kind=icon}
 "Starmageddon"){kind=icon}
 "Toss the Turtle"){kind=icon}
 "Canabalt"){kind=icon}
 "Heavy Weapons"){kind=icon}