I highly, highly recommend Prodigal. It’s an absolute gem of a game if you’re a fan of the Oracle games, and it’s currently on sale too. It nailed the GBC art style and palette, and it has an interesting story full of mysteries.
There’s also Beyond the Mountains, which is a passion project by a single developer. It’s not as polished as one would hope, but it’s free, and it’s a fun game that can be completed in a couple of hours.
If you happen to find any more, please let me know! I have a special place in my heart for the Oracle games, and I would love to play more games like them.