the .exe keeps crashing whenever i open it
105 days ago (+1)
Are you sure you extracted it properly, just be the 3 files, and the custom map folder, inside a folder (not the zip).
Otherwise you could try running it from command prompt, and see if it outputs any errors when it crashes. Ignore the 3 red extension errors, and 1 yellow icon warning, they're known and shouldn't ever cause it to crash. But any extra ones could explain the cause.
104 days ago(-1)
Create a new text file inside the folder you extracted the game in, name it however you want, then open it and paste this:
"Deltarune Lightners Live Plus.exe" --rendering-driver opengl3
change the file extension from ".txt" to ".bat".
Now open the ".bat" file and enjoy the game :)