Goo job! And a few ideas for improvement...
Nice game, here are just a few tips for improvement:
* As a player, I didn't notice any difference between the four weapons I was offered. The difference, if there is any, should be clearer.
* There seems to be some bug on the last level - I wasn't allowed to change weapons or reload, in fact the game crashed after frantic key-pressing.
* Different opponents could require different weapons to beat - there are tanks and jeeps, but i just have to shoot the guy on top of them to pacify them - I want a bazooka to deal with them instead >:)
That said, it's certainly an above average game, and I can see a lot of work went into making it (the 3d stuff). So i'm curious what will be next ;) Good job!