I have that same kettle, it’s so simple but great.
It develops pretty gradually and is a much bigger game than it seems from the cover but it also gradually adds things to automate a lot of the things that you have to do manually and just keeps growing. I’m just over 35 hours in and about 75% complete (I think). Even though there’s a lot to do in a day there’s no real time pressure because time doesn’t really pass except when you do start a dive or open the restaurant. You always get two dives in the day (and an optional one at night) and then open the restaurant.
I’d put it about the same as Stardew. There are boss fights and there are some jerk animals that are dangerous and a PITA to kill but generally you can avoid them or develop ways to deal with them. Overall it’s a fantastic game with a great sense of humor and just when you feel like you’ve done all there is a whole new mechanic is unlocked.
Probably why it’s so fast because it only has like 17 pixels. 😂