The goal is to build towers and defeat enemies until you get to the end of the map. Basically, you have to defend your towers, which is why the game is called My Tower Defense for Android. There are several levels to make it through, but beware. Once you use all your lives it is game over and you are done.
The final score after all your lives are done can be posted to the Swarm supported leaderboards. This allows for competition among players around the world, adding a little challenge and twist if defending towers isn't enough for you.
There are three different kinds of towers: ice, poison, and cannon. Use these to defeat enemies and make it to the end. This is a game of survival, and it is each man for himself. You can do it! If you can't, don’t worry. Just whip out your android any chance you get and practice, practice, practice. What better way to turn down time into fun time? Play in line at the grocery store, waiting on the server to bring your food, or just because you can.
Put your architect and enemy fighting skills to work in one place, and if you have neither never fear. Just keep playing and you'll end up with both!