We greatly appreciate you reaching out.

Given that this game is set within a sunken vessel, we have incorporated substantial screen shaking to accentuate the ship's tilting. Therefore, screen shaking is a vital feature, making it quite challenging to remove entirely.

However, I understand that the discomfort caused by the shaking is a serious issue for you, so I'll consider what measures can be taken. We plan to release future updates, and I'll consult with the development team to see if we can include any improvements.
(For instance, incorporating a feature that displays a fixed marker in the center of the screen, as seen in other games.)

Thank you sincerely for your invaluable feedback.