Hey! Nice timing on the web build. I'm more of a store-page nerd than a twin-stick expert, so here's feedback from that angle, page-only:
1. You already have a playable demo here, but the Steam page doesn't offer one. With an April 2027 date, getting the demo onto Steam soon means wishlists from people who play it, and a Steam demo is what lets you join a Next Fest (February would fit your date), which is usually the biggest wishlist spike a small game gets before launch.
2. The short description says "twin-stick shooter", but the About section reads like a survivors-style run: swarms that grow, a boss every five minutes, six depth zones. That loop is the thing people search for right now, so I'd say it in the first line ("survive a deep-sea trench that gets deadlier every minute") and make sure your tags match whichever genre is really true.
3. Local co-op is buried mid-paragraph. Co-op shooters get picked by friends looking for something to play together, so I'd put it in the short description and on one screenshot or the trailer's first seconds.
The headlight mechanic (bonus damage to whatever you light up) is a great hook, by the way. A GIF of the light sweeping onto a big creature would sell the mood faster than any text.