Make a sequel.
>I love the variety of weapons and upgrades although the secondaries get pretty useless once you've got your first primary weapon.
>You could add more on both weapons and upgrades since some get repetitive. (Bought the AK first then the M14 and they felt the same)
>The enemy variety was pretty slim, as well. You may want to add new enemies if you decide to make another one.
>Some of them attack too early. They'll walk just 1/4 of the distance and start firing, making it pretty hectic in the later levels.
>Try adding a story, something that advances the more you play. Add to that, try putting in night time missions as well. (Shooting in the dark or using Night Vision goggles/ a Gun-mounted flashlight instead of a laser-sight would add a new difficulty)
Overall, I find it really addicting, though repetitive once you've reached level 20+.
(To those asking how to repair, you can find it on the Load-out, to the Left of the grenades. It's the crossed wrenches.)