Calming music, gentle colors, lighthearted dialogue, sinecure tasks, all gift-wrapped with a bow for a heartwarming experience. ...this isn't my beat.
Whenever I do a review, I try to be justly fair by judging not from my enjoyment, but from a professional aspect that alines with the creators'. Noting the effort they placed in it, considering what was going through their heads, and reflecting on how their audience would take it.
Your goal was obvious the moment Maple stepped outside of her house, to give a chillaxing experience, but my personal aim during that moment, finish a series of side-quests and think creatively to obtain all of the medals.
Every so often, I'd return to this game to catch that fish and to find that last secret medal (if over a thousand people can get it, yet can't manage to reach the same number with the other medals put together (excluding the starting one), then I must be doing something wrong). It's during those times that I notice the little changes made to the game that adds to the tranquility you're setting. From the scuddeling crab on the beach to the very helpful 'instant catch' style of fishing, the commitment placed into this game is something that shouldn't be overlooked just because I can't catch something that's comparable to a shiny Pokémon.
To wrap things up, this game is too mellow for me with my hasten attempts to reach the goal, but that just shows at how well it did to achieve that good-vibe feeling of mellowness.