Really relaxing game.
I like the idea of only bringing two items at once, inviting the player to try out multiple combinations, but since the movement is so slow, it can get really tiring to walk everything back to locked doors and passages every time you change your items, so please consider tweaking the movement speed.
The art is really cute, but you need to better separate the backgrounds from the actual foreground. I kept trying to jump over rocks at the cave that were actually background, but had the same color as the places where you do the platforming.
With proper polish, this can become a really cute and enjoyable game.