You know I've been playing this game for almost a year now and I keep coming back to it just because it's the kind of game I'd like to play on my phone or tablet - there may be many others out there like it but I chose this game and it still keeps me hooked (ads and all, hehe, I don't judge - as long as they're put in the right way kinda like you did it).
I love the RPG-like system you've implemented - being able to upgrade stats and unlock gear is quite impressive, as well as your implementation of upgradable weaponry - it's always fun to upgrade that mediocre rifle into something quite formiddable (not to mention having the added benefit of slowing down time when you aim! Who knew ironsights could do that? Lol!).
If I may ask, are you willing to discuss your future prospects for this game? I'd be interested to know what you envision for this game going forward.
I think anyone else who visits this page would be interested to know too.