Bug

I while ago when i was going to play the game, i bug happend because when i went in a bunch of random colors started showing and from what it looks like it looks like the game is zoomed in. When i proceeded to go into the game and the meny it just started to show a bunch of colors. When that was done i was supposed to been in the meny but insteed all i saw was the pitch in the meny. Please help me fix this.