Turning Adventure into an 8k game...

[Nukey Shay]

Yup...the BNE at the end works as an unconditional branch. It works fine as long as the last result was non-zero (which the PrintDisplay subroutine does...since it loads an immediate value of $20 to reset the countdown timer just before returning). If you can't be sure of what the final processor status is in the JSR just before it, it's best just to change it back to a JMP. The Portals and Mag_1 subroutines also always end up with non-zero results before returning (Portals ends with $FF - the value sitting in the Y register...and Mag_1 ends with the magnet's Y-coordinate+.