As others have said, there's nothing in the game right now that really stands out. I see one of the screenshots has boxes with arrows and it's like "oh wow, maybe there's some mechanic or twist I haven't seen yet!" So I kept playing but nothing like that actually appeared in-game, just the 10 or so basic levels. So my feedback is that you have a good foundation but it's really lacking in content right now. One possible thought would be to use different shapes than cubes, force the player to have to think in different paradigms, idk.