Tower Defence

Playe here:http://onemorelevel.com/games.php?game=415

Tower Defence is a simple, fun, addictive, and challenging game. Your objective is to place towers along a path at strategic points, and defend against enemies going along that path before they get to the castle. You have 10 lives, and every enemy that gets to your castle takes away a life. Each tower can be upgraded to increase damage and range. The amount of money per enemy killed is 8*the current wave level.
There are a number of ways to cheat in this game, which I'll leave for you to figure out.

This game is awesome, and you can be expecting me to write further reviews of this genre later on.

The Challenge

Play here:http://onemorelevel.com/games.php?game=321

In The Challenge you play the role of a ball and fight other enemies that are also Balls. The basic game play consists of fighting an enemy with a sword, spell. You may also use items, concentrate(increase damage), and Escape. This game has 20 swords which affect the damage of everything. The better the sword, the more damage done by everything. At the end of the battle you get expirience and credits. You can use credits to buy swords or items.
The game may seem challenging at first, but once you get the spell "Blizzard" you can kill enemies with one hit. On top of that, you choose the level of the enemy you fight, and after a littile while, your level can increase 100+ levels a battle.
This game is boring and unintresting in my eyes.