Not too shabby
Kept me entertained for a while. The 20000 laser thing means you can kill with less shots, (laser scope perhaps?) It took 3 shots to kill an infantry without the laser and only 2 shots after I bought it.
Some bugs you might want to fix...
After you get the cheat, the talking head stays on the screen for the rest of the game. An enemy got close to the right side then disappeared behind it. I tried shooting all over that area but I don't think I hit him and the game ended. I think a close button would be really helpful.
After goofing around with the cheat I just kept dropping nukes. The game still ended even though everyone died the second they appeared on screen. Is this a bug? or is there a hard end point depending on the number of kills you get?