Starting over each time you fail is bad.
The game is kinda short once you pick up a piece of paper and a pencil...
Normally, I like this kind of games, but I can't really give you more than 2/5.
Try spending more time on the story of the game next time. ;)
The game might be a little short. Also, it would be nice to have more defender types and spells. Graphics and sounds are awesome - most of the TD games look like crap, so this one definitely stands out of the crowd. I'd love to see a sequel for this game. Good job - you have my 5/5. ;)
 "Frontline Defence Beta demo"){kind=icon}
 "SHIFT 3"){kind=icon}
 "MiniCar Racing"){kind=icon}
 "Kongai Launch"){kind=icon}
 "Alex the Adventurer"){kind=icon}
 "Toy Around"){kind=icon}
 "Ultimate Defense"){kind=icon}
 "Renju"){kind=icon}