Used to have that problem awhile back. I did these things to get it to work.
1. Clean the disc. Actually clean the disc using something like
this2.(this I did just for the hell of it) Move the lens to the center of your GCN. My personal opinion if it moves back to its original place there is nothing wrong with your lens.
3. Now put the recently cleaned disc in the GCN then press the play button. If it is still going to the menu. Check to see if the game is warped.
4. If not warped open the GCN(while leaving it on) and spin the disc. I've had to spin a game before it would start spinning on its own.(Glad the game wasn't mine lol)
5. If it still doesn't work really look at your disc and see how many scratches it has since that might be a factor, although my SSBM disc could disprove that since it has scratches galore yet it works like brand new(can't say the same for its case(bought it used at gamestop)).