Thanks for asking! (Sorry to have been this late in replying.) Anyone encountering these composers’ libraries for the first time is, I feel, a moment away from experiencing something beautiful. It’s always a pleasure to guide anyone toward these artists and their collections! On account of your asking, I updated the game’s main page to include this bit:

CART LIFE’s soundtrack features maximum bitrate chiptune compositions by MAT64, STU, LO.BAT, & POCKETMASTER.

There’s also one track (a slowed-down, chipset cover of “follow you into (etc)”) made by a gentleman named Luke Hodgerson which was since removed from the youtubes and, since discussing its use in this game with Mr. Hodgerson years ago, I’m afraid I can’t be certain of his online whereabouts. However, each of the tracks which play as loops in Cart Life (including this one) are included as full-length mp3s in the download.

Cheers!