1) This isn't really a game. (I know its short)
2) stick figures that do not react to people dying
3) no reason to why I am shooting them
4) cross hair sucks

1) They at least die when I shoot them
2) sure it took a lot of work
3) practice makes perfect
4) keep making games I will favorite you to check haha

There isn't enough to do, also the grey space around the crosshair isn't big enough I can see around it.

Not really a game, not real objective here.

"...Please tell me any problems and things I did wrong..." Well, there's almost no time, or effort put into this game. I could go further into detail on how this is so, but I feel like it's so obvious, that I shouldn't even have to explain. Please, people out there put their time, and souls into making these games, I expect the same from you, even thou this is your first game. Make a actual game, and I'll give it more than a zero.

Not too bad for your first game, but it needs a lot of improvements.

1. It's way too short.
2. Some music would've been nice.
3. Nothing happens when I kill all of the guys. No victory screen or anything, I just sit there. I felt like I kept missing someone, but that's just how the game ends. It should actually have an ending.
4. Also, the stickman sniper thing is so overdone.

For your next game, make it a decent length, add music, actually have an ending, and try to do something original.

Good luck!