The game is interesting for sure; usage of the theme wasn't great though. You mixed up left and right mouse buttons which doesn't help people trying to play your game. Your transitions are a bit abrupt and should be a bit smoother. I literally didn't know about the other dimension until I saw the gif, this is a mild issue, maybe add a hint that pops up if a player is taking a long time? The second level was kinda strange so a rework may be needed. But I would still love to see this game continued.