This app was mentioned in 3 comments, with an average of 1.00 upvote
I haven't played it so I can't confirm, but "Microcosmum: survival of cells" has visual and gameplay similarities to Auralux, so perhaps that?
I've been playing Microcosmum lately and it's very much like Auralux.
Mechanics sound like Microcosmum, but the setting is different.