Forums aren't really a clear way of seeking feedback unless you're posting a link to your game's hub (be that a website, a dev blog, a demo, a trailer, WIP, etc).
Something to keep in mind is that, although the industry plays the game of "here's what your getting for this price". I feel that indie games live by different rules to justify pricing. Honestly those bullets wouldn't have me pulling out my wallet and dropping $10 no matter the quality of art or other mechanics (because you aren't sharing them). However if the game offers something unique to any of the listed bullets (preferably all of them). Then I might take an interest. For example.
* Multiplayer: 2 to 4 Player Co-Op (If this was cross platform multiplayer allowing me to face off against other hardware I'd be interigued as to how you pulled that off and I'd pay $10)
* Single-Player: 4+ Hours (If this 4+ hours involved some level of dynamic or non linear story telling that explored some creative directing I'd pay $10)
* Weapon Classes (Honestly this is a masturbatory bullet, I'd rather discover that a game has this feature then have a developer brag about the hours they spend diversifying their game the same way every shooter does)
* [In Development] Level Progression system (Again this is as old as any dice game, not really a selling point for me)
* [In Development] Unlock weapon accessories system! (Your game pacing systems don't really interest me either)
* 5+ MP Maps. (If you have a neat way to interconnect these levels like something "in fiction" or a unique mechanic instead of just a level selection system like so many games I might pay $10)
Big industry can afford to not innovate but indie games are(IMO) worthless(shareware) if they don't give me something new and show it off in a pretty entertaining way.
I'm not criticizing your hard work and finished production. I just feel indie devs have the luxury of not living by a publishers "limitations" so if your project isn't under the gun. Take what you've made and try bringing something new to the genre. Most importantly find an entertaining way of showing it off, to intrigue us and other gamers.
Short answer, no. I'm not paying $10 for your game. Not yet...