Finally, the game worked for me! Now for some critisism.

First, a general comment. That sort of landscape- rolling hills and whatnot- is very unsuited to the abilities of Jazz and Spaz. The maps would have to be much more platform-based, with plenty of oppertunities for jumping of all kinds, for double-jump and expecially copter ears to make sense. However, I would think that this is just a temporary map till you can finish a better one and such.
Next, a more specific comment- you must already know this, but the collision physics are mighty messed up with regards to walls pointing straight up. If you walk straight into one and it's high enough up begin to levitate up it; if you walk in at an angle, you walk through it.
Next, another specific comment. I think that the way the weapons move and act is a bit uninteresting. For example, the basic blaster. It seems capable of rapid fire, yet it fires perfectally straight. It would be so much more interesting if the bullets randomly fired very slightly off, so as to make it look a bit less boring. The same goes with all weapons that fire straight and are capable of rapid fire, and I would say it would make bouncers more interesting also. I think the seekers shouldn't be capable of turning such sharp angles, but that might also give them problems in them hitting their target.
Finally, those mosquitoes are nearly impossible to hit with anything but seekers. I mean, adding the third dimension makes the normal jump-and-fire trick so, so much harder. Maybe make them larger or make them register near-misses as hits or something.