Thanks for the feedback! for some reason when I was creating the game, the movement wasnt so fast in Unity, I make sure to test my games more after the build. And about the art, you are totally right.thanks for taking the time!
Are you aplying the movement in Update()?
If that's so, you have to multiply it by Time.deltaTime (the time between a frame and another)
That way, independent of how slow or fast is the computer the game is played on, it will move the same speed!