Loved it ;P Nice idea and well made. Encountered a small amount of lag briefly at one point but it was very short and I am on my laptop. I loved the idea of having allies backing you up all the way and actually being helpful rather then in the way xD
All in all I find it an awesome idea and quite fun. Not sure why I'm seeing so many negative votes -_- especially with such generic responces. Haven't seen all the reviews but I'm sure there will be a "Add Multiplayer ROFLMOAWWDWDW!!!!W"!£!" somewhere...
Love the shield system, it's concept has been used many times in different games yet nearly never done right when it comes to flash games (Usually to ...clunky *Shrug*)
All in all I think it was fun to play