A few months ago, chiptune artist Shnabubula produced an incredibly sick piano / chiptune mash-up album called NES Jams, and it was good. At the tail end of May, he released a new album called Starbound, and surprise, it's also good!
Different in tone, emotion, and style compared to NES Jams, Starbound is a completely original, five-part chiptune space opera. The music alternates from light and spacey to toe-tappingly upbeat -- what I think a shmup on the Sega Genesis would sound like if the number of audio channels were increased and there were no other no restrictions to speak of.
This journey of the mind and soul can be yours for the price of free, though I doubt Shnabubula would complain if you tossed a few bucks his way.