I developed a BepInEx mod called WhiteKnuckle Re-Zero.
The mod removes the standard death delays and load transitions, allowing you to instantly revive from your last save state upon death without breaking game entities. Additionally, it features custom audio support, meaning you can drop your own audio file (.wav, .ogg, or .mp3) into the mod directory to play whenever you respawn instead of the default sound. If you die without an active save file, the game naturally falls back to the native game over screen.
The project is completely open source. You can inspect the source code and review the architecture directly on GitHub:
https://github.com/Cr-i/WhiteKnuckle-ReZero
To download the compiled plugin binaries and releases:
https://github.com/Cr-i/WhiteKnuckle-ReZero/tags
If you encounter any bugs, desync issues, or unexpected behavior during your runs, please report them so they can be addressed.