Beat it on my first run, it crashed and saved only my progress on treasures and shortcuts. Beat it again on my second run, got the same error:
___________________________________________
############################################################################################
FATAL ERROR in
action number 1
of Step Event0
for object obj_npc_soldier_end:
Variable obj_npc_soldier_end.spr_npc_soldierwalk1(101362, -2147483648) not set before reading it.
at gml_Object_obj_npc_soldier_end_Step_0
############################################################################################
Fun enough, but very easy and that major bug is a sour ending.