Unfortunately there's no way to get the items required to progress, as the tree tiles surrounding the chests are solid. Might want to take another look at the tileset and make sure the top halves of trees are set to "walk behind". (It's been a while since I used RMMV, so I'm afraid I can't be more specific than that.)
Also, using music from existing video games is generally frowned upon. If you need music for your projects, you can find assets right here on itch.
(Edit: It also looks like you've submitted this to multiple jams at once. While some jam runners are cool with that, the Bone Jam specifically requested submissions made for this jam.)