YAY! Made it all through the game. It was little challenging, because of the physically based possibilities. But it was all about using some logic and mathematical estimation. Got all of the stars.
The game is almost absolutely great!
I only criticize the size, colour and placement of buttons. Sometimes I was concentrated in the game and clicked accidentally on the restart button, and other times when I failed a level or wanted to restart I accidentally pressed that MASSIVE "solution" button. That bottom menu is very big and annoying. Also, red colour draws a LOT of attention, so use it only for very important stuff.
Other than the menu, everything else is perfect. I like the drawings, transformations, sounds, background tune, interaction, scenario elements, puzzles. It's a really good game.