Construct a maze of attacking towers,
Release the creeps into the maze.
Collect cash from killing creeps.
Upgrade / Build more towers.

Release Notes:
version 1.0.6

Back button fix
Added cheap blocking tower
Map scrolling sensitivity fix
Resumable upon exit.

Release Notes:
version 1.0.5

1. Scrollable minimap
2. Multiple entrances and exits.
3. New enemy species
4. New Tower Types
5. Tower selection menu
6. Tower upgrade menu
7. Menus for setting, restart and instructions
8. Trackball sensitivity adjusted
9. Surprise attacks.

Release notes:
1.0.2

1. The final position of turret is only upon onTouchUp event.
2. An indicator of the turret positioning during the onTouchMove and onTouchDown events has been added.
3. Fixed the sprite bug in 1.0.2 for Laserdroid.

Release Notes:
v 1.0.1

1. 'M' button to mute sound
2. Gridline added for easy placement of turret.
3. Difficulty readjusted for Normal and Pro mode