I slightly modified the mario_actions_moving.c file (replaced the code from an older decomp) and that removed mario's instant turn around. In case someone else wants the same thing ill attach the file.
file locations is the src/game folder...
mate sorry to hear that, I do not own the code and really do not know too much about coding you should open a issue on the repo or the repo of original port, but they had no changes on years.
Thanks for the write up! I complied the newest version but was wondering how do I turn off Mario's instant turn? In the original game he does a 'circle turn around' after jumping. I see that was removed (it was strange behavior to begin with)...