This app was mentioned in 4 comments, with an average of 1.25 upvotes
I messaged the devs, but however there's a new version of the game. this although I'm gaming right now. I did play about 6 rounds it's also fun. Free to play but there's iap nonsense. Still the free stuff is fun. At least what I've played. I'm not sure I'm sold on it vs 2 but still fun.
https://play.google.com/store/apps/details?id=com.thevoxelagents.tc3
Innovative and very addicting, free (not P2W), has interesting rails building and new levels discovery system.