Finally found this game! Seen some gifs in Discord.
We also went over this concept but decided not to do formations, so I'm very happy someone else did it. It's very fun and the UX is very well-made: like making gates faster, the blocks fearing for their dear life when standing in the wrong place and a nice tutorial.
The only downside is sometimes the cubes get stuck in each other sides and sticky mechanic is a little bit finicky (especially during jumps). But a very enjoyable & cute game nonetheless. Take my rays of love.