Music: Unity — TheFatRat
Source (artist upload): https://www.newgrounds.com/audio/listen/621134
License: Creative Commons Attribution 3.0 Unported
https://creativecommons.org/licenses/by/3.0/

Changes: Excerpt from 48 to 64 seconds, converted to mono WAV, short boundary fades. The game fades the playback volume as star invincibility ends. No endorsement by the artist is implied.
The source upload explicitly provides its CC BY 3.0 license; this is the licensed 2015 Newgrounds version.
Game excerpt: music/UnityPower.wav