Guitar hero for ti-84+

This game is in basic and also not locked, just incase you
wanted to look at how unefficiently i made the game.
works well on ti-84+ se also works on anything down to ti-83+,
however it is rediculously slow on the 83+.

buttons are
----------------|alpha
----------------|x-1
----------------|log
----------------|sto->

Runs 50 cycles then gives score, and songs are completely random notes.
Please give me feedback on how i might make the code more efficient.
e-mail is:
sampwns@yahoo.com