Not a bad game, but then the control gets so slow, it takes 10-15 seconds just to place a tower... and sometimes, that's the difference between a leak or none.
You have to love the moments when the controls ram you against a wall or into a corner and a homing enemy kills you because you can't go up, down, left, or right.
It's easier to score high if you ignore the arrows (bugged, they don't register on time) and just go for the A/S/D grinds. That way, you don't get penalized for trying to play the game the way it suggests.