Great game...
Great game, but as others have said, too short. The addition of melee weapons was great, and they worked well in this game. (i.e. in other games, if you try to use a melee weapon, you end up taking a hit, but not here)
The new weapons upgrade system was a lot of fun, and the weapons felt more "even" this time. (In the first Toxic Radd the fully upgraded flame thrower was far better than anything else.)
I would've appreciated an equivalent of the swat team guys from the first one-- they were fun to kill. But it's clear that you took the suggestions for the last game and made an effort to realize them. Great job!