Great work with Full Throttle Racing, Kale!
Of course, I only found out if it booted because I was trying to check on HDMA bugs anomie solved in SNES9X. MESS exhibits the same bug (it screws up the colors), and something or other is also glitching the mode 7 area (again, it looks like old Snes9x versions (up through the early 1.4x series), except worse because it looks half-height). These bugs occur in jetski races.
Not exactly sure what changed (not that knowing helps, but it was fixed in 1.40), but it's definitely listed as HDMA.