Just checked with Ashton & Megan. We've agreed that it's fine as long as you aren't monetizing the videos and as long as you credit all three of us for the music (since I didn't create the EP by myself). Maybe something like this in the description & credits or something:
Music: Space Crew EP by Megan Carnes, Nicholas Day, & Ashton Morris. https://alfredofreak.itch.io/space-crew-ep
Thanks for checking! :D