the 3D Unity game that i am making keeps crashing

while i can open other games I am making, this one i cannot.
it was working fine a few days ago but when i returned it will no longer stay open long enough for me to edit, it’ll crash within 5 seconds of it opening.

Close the Unity Project. Now open the project folder in the file explorer, inside the project folder keep the “Assets” and “Projects Settings” folder and delete the remaining folder and files. It might solve your issue.
@bithapi