The crash could be caused by anything, making it difficult to pinpoint the exact reason; the only thing you can try is the 32-bit version. As for the FPS, you might have vertical synchronization enabled.
very much appreciated, there seems to be a spam of either:
ERROR: Attempt to disconnect a nonexistent connection from '<RefCounted#-9223363508895176044>'. Signal: 'load_location_end', callable: 'Node3D(Game_node)::main'.
at: _disconnect (core/object/object.cpp:1640)
or this:
WARNING: AnimationMixer: 'break_2', couldn't resolve track: 'door_v2/RigidBody3D/Door_p1:position'. This warning can be disabled in Project Settings.
at: _update_caches (scene/animation/animation_mixer.cpp:725)
or things like that:
ERROR: Error calling from signal 'body_entered' to callable: 'Node3D(plash.gd)::_on_area_3d_body_entered': Cannot convert argument 1 from Object to Object.
at: emit_signalp (core/object/object.cpp:1311)
all those error messages are from different levels but they seem to have nothing in common.
Thanks for responding to my comments quickly btw and I wish you all the best with the development because the game seems really cool.
It's weird, there seems to be a constant error happening like 30 times every second.
ERROR: Formatting error in string "%s/%d": not enough arguments for format string.
at: (.\core/variant/variant.h:917)
The earliest I crashed was around 3 frames after spawning having only this error pop up.
Aside from that, there wasn't much more I could do with --verbose and openGL/x32.
Unless you'd like me to look for something specific but all the errors seemed to be similar to the ones I listed previously. There were some errors regarding discord or some enemy AI but I don't think those are important.
On the bright side, the in game crash thingy worked for the first time for me so I could relaunch + access the folder with logs quickly.
Last thing I want to mention: The OpenGL rendering looked very weird for me (flickering lights, frequent stutters, not fully lit or loaded roms etc.) but those stutters didn't result in crashes most of the time.