We apologise for the delayed feedback:
Firstly i would like to address your GDD, it was absolutely fantastic! The amount of detail here really shows the level of planning that you have done for the game. The formatting could be adjusted to make ingesting the information easier as it contains rather large walls of text, and it would be great to see more illustrations.
Now for the game, the first thing i noted was the settings menu at the start of the game contained no text but that wasn't an issue as its obvious which setting was for the sound level. The visuals and artwork for the game are fantastic, it really provided a sense of "impaling" thanks to the shadows and dark aspects of the game. The movement felt good but could really do with some smoothing. It feels like it takes multiple seconds to turn around which in a game of this style can cause some issues with playing it.
Overall this game was very fun to play, it has the bones to be a fantastic games once some "final steps" are taken to finalise the game. Please keep working on this game. Great Job!