Definately good potential and giving off brotato vibes!
i think that the deep sea theme has a lot more potential than what this demo shows. for example it could be that you are not locked in to a static area but rather that you can actually keep swimming down to reach new depth and more dangerous enemies. then you would have to balance gearing up vs reaching going down.
also i think it needs a tighter game loop. right now it feels kind of grindy but without purpose. and some meta progression! maybe keep the skill tree unlocked or at least visible over different runs and then you need to chose a strategy of upgrading while diving deeper idk.
i didnt quite get the gatcha appeal and in the end ended up just having gazillions of eggs that i needed to spam click to open. that was not particulary fun.