First of all, kudos for the originality. I haven't seen a mother fan game until now :D.
Now, for the part that makes you cringe or yell Hurrah: The crit. >:D.
First of all, becuase you have no screenshots or any graphical thing fo that matter, I will leave the Maps and events page of critism blank :P But, you do have tiles, which are important in every game, so I'll rate you on those. Esmas is an overall very good spriter, and props to him for taking on a new style and tackling it hard. I mean it; amazing tiles, Esmas. They look like you just ripped them of Nintendo. Great work. And since mother game's core is the story, I'll rate your story as well. It seems like a strong story, but you need to work on making it larger and giving it more detail. Overall, nice job Eneko. If I remember correctly, you posted saying you'll have screenshots up this weekend. I can't wait to see them. Very well done, Eneko & Nytkoi. Good luck.