First Game?

I finally invested in a Game Boy Sp 101 (bye bye $130)! I was NOT expecting it to be so bright and loud judging from what I was reading about them! What game should I buy first?

I finally invested in a Game Boy Sp 101 (bye bye $130)! I was NOT expecting it to be so bright and loud judging from what I was reading about them! What game should I buy first?