Things my game is capable of:

• Draw tiles for the background
• Move the wall of doom forward

In my game you start out with a single piece of wall which is moving forward. As you move along things will appear that the wall will crush. When you crush things you get resources. You can use these resources to upgrade existing pieces of wall or build new ones. The two red wall pieces show you where you can build things.

The image is not very impressive. Looks cooler when you can see the thing actually moving forward.