This is an unfinished project. It is a 2D version of the Mann vs. Machine Game mode from Team Fortress 2. The instructions to play are included in the start menu, which shows up when you press the flag.
Thanks to Valve and Gabe Newell for the idea and the material which allowed me to spawn this idea. A special thanks to the Dead Worker's Party for their longtime contributions to TF2's overall amazing community, which has made me actually want to play TF2 all the way from my beginning in 2008 into the never-ending future. I have listened to the Control Point podcast since 2008, and one episode inspired me to create a 2D version of Team Fortress 2.