I may not be able to help you, though I checked, and saw the output_log seems to be one of the concurrent files active. As I saved in game I checked to see in both Saves and SavesBackup folder, and it's empty. So maybe in Immortal_Darkness_Data folder, the output_log may be linked to saved game data.
Akin to Legacy of Kain and Diablo. Took some time to play this cutesy aesthetic dungeon slash n magic game. It ain't bad, though pretty standard with traps and pitfalls.
looks very mobile port
https://steamcdn-a.akamaihd.net/steam/apps/269370/header.jpg?t=1454787155
I guess the only relation is the chibi pale swordfighter.