Condemned World TD

In this condemned world seems like nothing can stop the creatures of the dark. However, there is one thing left to mention. Use gems and towers to kill the incoming enemies.

The enemy is moving and you have not enough power to stop them. Yet, they are going to attack in waves, so you have a chance to win the war. Build a tower and choose a gem to infuse, which will add an effect to the tower. Kill creatures and upgrade your towers or build new ones.