I am experiencing the same bug as Xeda112358. When I try to use an item in a battle, first the game freezes and the grayscale stops working (only black and white). After a few seconds, the screen clears and "error:link" appears. After that, I have to reset the ram for my calculator to behave properly (garbled screen, etc.). I even saw a blue line of death once. I have a ti-84 plus with 2.55MP.
I found another minor bug: when there is options in dialogues, sometimes the bullet that indicates the selection doesn't move even if the other option is selected. It happens mainly in the first area.
P.S Reuben Quest: The Lost Mirror (ASM remake) works perfectly on my calculator (great game!).