Completed the game
Defeat invader (Beat level 6)
Defeat samurai (Beat level 5)
Defeat vampires (Beat level 4)
Defeated 200 flying enemies
Purchased 1000 units
Defeat demons (Beat level 3)
Purchased a coin grabber
Built a mine
Defeated goblins
Purchased all tower upgrades
Built a windmill
Purchased 500 units
Pressed the buttons for 7777 times
Defeated 500 enemies
Collected 500 coins
Purchased all unit creation speed-up upgrades
Collected 250 coins
Purchased 250 units
Pressed the buttons for 4000 times
Pressed the buttons for 1000 times