The only issue I had with the game was the double-jump mechanics. If you touch the side of something while in midair, you can't double jump after. This got rather annoying, but the game was still fun regardless.
Even though this was mildly entertaining, I'm giving it a low score. People were hacking to hide inside the crates, amongst other things. Ping was also an issue, and people were sliding all over the place. I know ping issues are common in all multiplayer games, but to have the lowest ping and the person while the next lowest is double mine shows some issues... Add in the fact we cannot play fullscreen on Kongregate, and can also only play one map here, and this game suddenly earns very little play value.
I was sad when the game just looped over again when I beat it other than the extra flashing screen saying I won. I expected cookies or something awesome like that. Regardless, I'll give this a 5 because it was pretty interesting and actually made me want to beat it.
I really don't suggest copying 20 @'s and pasting them for 5 minutes, because I crashed the game. However, upon restarting, this is a fairly good game to go into my favourites along with Robot Dinosaurs that Shoot Beams when they Roar.
I honestly didn't experience any of this lag people are talking about, and my computer is only decent in my eyes. I decided to play it on "Amazing" and put the graphics to high to see how bad the lag was that people were reporting, and got none of it whatsoever.
Regarding the game itself, it was fairly well done. I would've preferred a bigger challenge, but it wasted a good 40 minutes or so. It'd be nice if the flamethrower had a larger range, but that's my only real issue with this game.