Good, but...
Now, let me set this straight: I am a fan of the "Choose your Weapons" series. That being said, there are a few points present in the first game which I had hoped would be fixed by now, namely, the extremely similar levels and the lack of an easy way to switch weapons. Greater level variation would motivate me to keep playing beyond 20 or so levels, and a button to toggle through weapons instead of using the number keys would eliminate situations in which the player dies because they can't swap weapons quickly enough (Some of us can't use the A-S keys, arrow keys, and number keys at once...)
On an unrelated note, I noticed that a few levels in, (the first level featuring the large flying toaster) something like "Acquire all Weapons" flashed at the bottom of the screen, granting access to all of the remaining weapons...was this intentional?