Got some bugs/issues to work through, but it's a pretty good tribute. Using only nukes, I'm convinced you could keep going forever, as when you get to the higher levels, not only does each nuke earn 10-15k point at least, the debris slows your computer down to a level where you can plan everything... and have to wait minutes to execute that plan.
The flamethrower is absolutely useless. I sat there flaming some zombie for like 10 seconds and he didn't go down. For this reason alone, you get 1 star. This game has potential - I like the multiple defense points... also, do we actually have HP or something? I tried to avoid getting hit but I didn't see any kind of health bar.