You wanna know something that's writing 101? Raising the tension... then breaking it before raising it again.
People are spending 100s of hours playing the game. It would be uncomfortable and overwhelming trying to maintain one mood throughout. There's nothing wrong with humorous, lighthearted moments. In fact, those scenes are necessary.
Now, you may not think it's funny. But that's a different argument. That's a matter of subjective taste, not a matter of "writing skill."
