Hi quaz!
This game is awesome! You do a great job of introducing new pieces as they become relevant. For example, on level 5, the start of the level made it very obvious what the tri-piece was used for, so I had no trouble grasping the slightly more complex setup on the bottom half of the level by myself. It's really a clinic in good level design.
Great start! I thought the puzzles were relatively simple. Crank up that difficulty and this is a solid mobile game ready for commercialization! Great job!
Best,
Brandon