Both's The Tower app for iPhone and iPad

Turret:
- To choose a turret: click on the turret icon at the bottom of your turret select screen (as long as you can afford it)
- To place a turret: select a turret, then click on the empty space
- To upgrade/sell the turret: click on the empty turret and click the desired button

Turret types:
- Standard turret: shoot bullets one by one
- Rocket Launcher: firing a rocket also damages a few nearby enemies (less damage)
- Laser: Deals damage as a percentage of the enemys health and slows the enemy (it takes time for damage to increase)

Enemy Types:
- Gray (fake): show tracking, 0 lives
- Blue (simple): average hp, average speed, take 1 life
- Yellow (fast): very low hp, very fast speed, take 1 life
- Red (tough): very high hp, very slow speed, take 3 lives
- Dark Purple (witch): high hp, slow speed, spawn skeleton, cant slow, 5 lives
- Light purple (skeleton): very low hp, fast speed, cant slow, 0 lives

User interface buttons:
- To pause the countdown of the next wave: click the play/pause button at the top right of your screen
- To show this tutorial again: click "i" at the top right of your screen
- To spawn a fake enemy showing tracking: click "!" at the top right of your screen

Advice:
- Killed enemies and completed waves both provide coins, so you can build and upgrade even more turrets!
- Remember to use a variant of the tower to defeat all types of enemy waves
- To reset your progress, go to the main menu and click "reset game" at the bottom left