This was cool, and tackling a stealth game is especially tough.  I like that you added the objective to the start screen, that was super helpful.  In the future I would add some sort of radar to help sneak a little easier as the guards move really fast and without any hint they're about to patrol.  

you cant shot in the game,enemy deceted you everytime no stealth mechanic and this is a stealth game

The retro aesthetic was achieved I believe:) I was confused at first how to play the game, and found out you use arrow keys to move, but also I had fun dodging projectiles! It's not too bad for a first game- I also really loved the audio track! It also further helps me immerse in the retro theme:) i was also quite surprised with the brown object thing that resizes on the direction you touch it- I assume it was to help get cover? either way it's a nice short game- did you code this without a game engine btw? but either way, I'd say this game did okay :D