Use Visual Studio (the Community
edition is sufficient) to open Projects\Visual Studio 2015\GeometryWars.sln.
Make sure Game is set as the startup project and run. The compiled binary
will be placed in the Binary directory in the root of the project.
Accelerate by pressing the ↑ key and turn left and right using the ← and → keys. Shoot enemies with the laser gun by holding the z key. Shooting will deplete your energy (green bar at the top-right); you will need to stop shooting for a short while to allow the energy to refill. The red bar the the top-right is your health and it decreases whenever an enemy hits you. Your score is in the top-left corner and it increases with every enemy you kill.