Lot of promise.
I really dig the aesthetic, the game looks and sounds great. No spoilers but I enjoyed the rise in atmosphere during the battles, especially the third one. Very cool to see these giant creatures move around and react to your presence, I enjoy being able to watch them for a bit before initiating combat. I think with more content and some story or other way to string the fights together into a meaningful story this could be a really cool game.
Now for the not so great stuff. Controlling the boat feels a little unsatisfying. I think the chop of the waves in the main issue, it feels way too strong. I understand it's probably for atmosphere and gameplay reasons, like making aiming more challenging, but it's honestly just making piloting the boat frustrating as is. My other big gripe is the final boss. I personally found it really out of place and kind of silly, especially the projectiles. I also didn't enjoy fighting it at all, I got stuck on it's body a lot and couldn't pilot away, and the fight ended up too tedious for me to actually finish.
So some minors gripes here, but I think this project is pretty cool, if work continues on it I think it could be something pretty cool.