Yes you are right... we are inspired from Dredge, but we could not finished the core loop of the game hahahaha... initially the idea is to catch fish, sell it, upgrade the ship to catch more obscure fish...
The main difference with Dredge is that every night, there will be a storm that force player to return to the base, but with upgrade, you could brave the storm and catch the fish that is unique in the storm.
Yeah we plan to implement it until that, so yeah, we will update the game soon to reflect that XD