Tap Defense on iPhone 3GS
Tap Defense may look very simple to play. Initially, you are given credits to buy your fighting equipment such as arrow towers, bomb towers and water canons (the only ones available during the first few levels). You arrange them on the field strategically and when you’re ready, you tap the icon “play.” After that, the enemies enter and try to make their way towards the end of the road. You are given 20 lives, which means 20 enemies only are allowed to get past your guard. Otherwise, the game ends and you lose.
As you advance on the game, you gain more credits and more fighting equipment (e.g. ice, storm, earthquake, etc.) get unlocked. Unfortunately, the enemies also become stronger and harder to beat. They range from locusts and dogs to Gremlins and demons.
At that point, the real strategic thinking begins. You have to budget your credits and at the same time position your fighting equipment in such a way that they win against the enemies.
I plan to write a more comprehensive review of this great iPhone app in the coming days. For now, lemme just enjoy Tap Defense further. Or better yet, become a Tap Defense fan on Facebook. I just did. 
Image Sources:
http://www.iphoneappratings.org
http://levoltz.com
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