This game feels more like a test, rather than a finished game.

 I suggest picking a theme for your game, a story and building the world around it, and adding your own original touch. Instead of trying to replicate an already existing very popular game.

Lots of placeholders, very dramatic credits ending which doesn't suit this game at all.

I don't understand why the title is 'the golden sun' there is nothing about golden suns here. I dont know who the character is, why he is fighting all those people with their little creature friends, why does he have to go into the cave?

I did not enjoy this game this time, but you're definitely better than me.  I wouldn't be able to code this myself. Good job and looking forward to see what you make next!