This is a really cool game!! I enjoyed playing it; it was fun and interesting. The graphics are of high quality, and the color scheme is pleasant. The mechanics of diving into the sea and using a locator to navigate in the pitch‑black sea darkness are quite unusual! I commend you for this idea — it was a real pleasure to play.
Nevertheless, for creative development, you need to be able to work within certain constraints and find cool solutions, even if something limits you. In this case, I can’t say that the theme is interpreted in any particularly special way.