Could use more variety. Only like four different types of weapons, three gameplay types, and all bugs are essentually the same.
Side note, nuke + lightning = suicide. Awesome.
I wasted a whole hour and a half on this. It's really addicting.
One problem I had--I completed the "Still Here?" challenge (very clearly--I've played for far longer than four minutes) and it didn't unlock the "Heckler and Koch" like I should have. This led to extremely frustrating problems later in the game, when I couldn't finish the challenge that tells you to use 25 different weapons.
How to make the nuke blow up.
@Jentaro9, and everyone else why wondered why the nuke didn't blow up
To make the nuke blow up, you must use it. You must then IMMEDIATELY switch to another weapon using the arrows and blast the nuke that is still lodged in the ground. The screen will then turn white, and a message saying that "you killed yourself" will appear.
i prefer zombs