I'm a huge fan of Little Nemo - LOVE the comics, but the NES game has a special place in my heart! It must be a thrill to be making this! It's great to see a GB followup, and I think you've implemented color really really well.
Are you looking to collaborate with anyone for music? I love to emulate different games' styles and I'm pretty good at remixing existing tunes as well. (Here's the recent Marzipan project I did for fun!)