Oh ok. Thanks as always for your comments. I agree the game will need some kind of long term choice path affecting your abilities or your weapons, and that could be done in many ways. However, I think weapons should be kept rather simple, since I suspect the most interesting part will be the turrets and building/repairing stuff, so emphasis on weapons would take away from that. I think bosses without turrets would be very fun, and again I should figure out the best way to integrate that with the core gameplay.
Can you explain what you mean when you say that you'd "do more to level design"? Like more complex room layout? I also agree I could benefit from looking at similar games. Did you have any specific ones in mind? I did play COD zombies, but don't know many more in the "survival shooter" genre.
just look at arcade survival shooters online and tower defense where you put turrets along a path. Your game is those two genres combined.
Levels i mean basic variation on the empty room. maybe four pillars, maybe a small dividing wall in the middle, maybe an area of lots of little rocks, any little variety which adds a bit more strategy. That's the tiles i added to still not dead, it just adds a little more thought about how to approach the fight, and incentives to use different weapon types, movements or tactics.