At first when I clicked on this game I thought it was going to be crappy due to it's file size but when I played it I realised that it was actually a great shooter games with a quite unique concept. The idea of controlling two characters at the same time that depend on each other for either protection or clearing a path was a good one and an 8-bit game is always a treat to play.
All in all it's not a bad game, although I'd say that like most shooters the gameplay suffers after a short while and the play becomes stagnant. Maybe upgrades would have helped it become entertaining in the long term.