Don't let the creeps reach the middle. Every creep reaching the middle of the platform will spawn a heavy particle beam, making parts of the platform unusable. Once you lost 50% of the platform, the game is lost.

Use different types of towers with different ranges to build a maze. The longer the creeps need to reach the middle, the longer you can shoot at them. Survive the waves of creeps and progress through the levels - with each level your platform will grow bigger and will spawn more creeps, which get more powerful as well.

Tower Defense

This game only features an Endless Mode - your goal is to hold out as long as you can.

There is different types of Defense Towers and each of them (once placed) can be upgraded to a certain level to get stronger - how long can you survive?

Want more?

Let me know in the forums - if you generally like the idea but want more features or challenges, let's discuss it in the forums. If enough people make feature-requests I'm going to make a sequel.