Amusing
Well, I believe the game has entertainment potential, however, it appears to glitch on the first weapon point, giving the player all 32 points needed to get everything. My guess would be you tweaked the code during beta-testing to make sure that all the weapons worked, then just forgot to change it back. FIxable, but it takes th point out of the game until then.
As for general play, it would be nice to be able to switch between the various weapons, rather than getting stuck with the last weapon you bought (which for me happened to be the auto shotgun). Also, the AI needs to do damage to the player quicker; when I found myself trapped by a mob, I could simply run through them without taking damage.
Also, (didn't have time to play every level) but the objectives also seemed to glitch a little. For example, on the level where you need to collect 30 presents, I was up to 27, when I ended up clearing the room just by killing enough enemies.
I like the selection of weapons, but again, switching would be nice. Saving would also be a big plus.
Lastly, I have to say that while the backstory isn't the most interesting I've ever read, it was a nice touch, rather than just dropping the player in feet first. As always, achievements would have been nice, but thats icing on the cake, and doesn't affect my overall rating of the game.
Overall, good game, some minor tweaks needed but nothing major. Maybe the next version could be a bit like a zombie arena, rather than just facing criminals.