I've played both versions of these as I'm a big fan of the DEER HUNTER games from years back. Just a few thoughts:
I like how you've updated the level layout to randomly change.
I like the idea of having 90-day limit.
The aiming system does seem a bit off from time to time (simply saying a player isn't hitting it is nonsense) but I found by NOT upgrading your aiming apparatus the game is better. When you upgrade, the aiming gets HARDER.
The rocket launcher is funny the first time then it just gets stupid. I'd rather have other more realistic weapons to choose from.
Maybe even add time-effects, such as daytime/night-time scenarios? Or other animals to take out or avoid? (for minus points)
Other than that, keep up the good work fella.