I posted this before in a general Starbound thread, but I feel that it is more suited for this area. I think that a planet with musical instrument npc's would be awesome. Like houses and buildings can be instruments. Every step you take plays a musical note of some kind, the type of instrument that the note is played from could be entirely up to the area you are in, randomized upon arriving to the planet, or just a user preference (relative to an item carried or something like that.) Then the sentient beings on the planet could be CD's, .mp3 files, .wav files, cassette tapes, vinyls, pretty much any form of musical media possible. And then the animals or enemies on the planet could be musical notes of various shapes and sizes. Could be flat, or sharp, E,a,d,g,b,e. lol. I think it is a cool concept and could be further developed, this is just an idea that could spark into something awesome. NEW IDEA: Communication with the sentient beings could be with musical notes. So you could have to use a translation device to change their notes into words. And then reply with a mini game, DDR/Guitar hero type play style.