Opening this solution requires MonoGame 3.6 for Visual Studio, which can be downloaded here:

http://www.monogame.net/2017/03/01/monogame-3-6/

Game can be played 1 player with a keyboard. Buttons:

Direction pad - move character, point gun, and hit the deck 'A' - fire weapon Space bar - jump

Game can be played with 1-4 players using XBox 360 Controllers.

Coming soon: ability to play using USB Gamepad. Using a USB adapter, you could play this game with an old school NES controller!