I really liked the calm vibe of this game. The turtle is super adorable and the swimming animation is nice as well. The sounds in the game work really well with the tone and mood you are trying to set. I think because the game is so simple, it would be nice to be able to customize things for the pet turtle, like the color of the sand castle and the calcium lamp. I think it would be also fun to add a decorating element to the game, like adding more plants, rocks, etc. I also think adding an eating animation would make the experience more seamless, as right now it seems the turtle kinda just absorbs the food. Great work overall!