After the game was over, it would immediately restart with all towers being full health, I assume that is a game over without any screen and the game starts again.
I was playing the windows version on itch app since I saw a single download I used the native install, nit sure if the default itch installed was an older version.
I have only worked with web builds on itch so dont know much about native versions.
I just downloaded the Windows version to check if everything is OK and when one crystal runs out of power, there is a game over screen, I don't know what's the problem with your game.