Even though it's a simple puzzle game, you'll want to go to the tutorial first, unless you're really good at getting stuff. It takes some patience to learn to "see" how a level could maybe be passed. The gameplay is actually very well implemented, for example the preview of what would happen with each move is very useful. I think I found a small bug: sometimes when you try to move the selector to a certain direction, it immediately returns to your current block.
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