OK, I just finished it. It's a very good game, but it gets frustrating for a number of reasons: 1) Sometimes the shapes' colour is the same as (or similar to) the background. 2) The eraser is fat and you can't see which spot it's pointing at. 3) It's hard to get a shape you're drawing to connect to an existing pin (you have to find the exact spot). That's a shame, as these irritating characteristics must be really simple to fix, and they take away a lot of the fun. 4 stars from me.
These monsters with many hands (tentacles?) are tough... at first I thought it was a boss or something, but then I came across two of them... I'm giving up. :(
@neoenigma: Firstly, you really need to learn some manners. If you go around insulting people like that for no reason, you're going to get in trouble sooner or later. Secondly, you also really need to learn some physics. Throwing a basketball at a ceiling is not the same as throwing it toward the ceiling and then making it spin rapidly (while in the air, too). If you had a device inside the ball that could make it spin non-stop then it would happen exactly as I said.
People complaining on the physics: The physics are actually very accurate. They're just too accurate for comfort. In real life, you can't control your movement mid-air. In real life, if a rapidly spinning ball hits a ceiling, friction will lead it toward the opposite direction from where it was going on the ground. I've beaten 14 levels so far, and I think it's a great game. I'm giving it 5 stars.
I've been using the magnifying lens and the mouse keys feature (you know, where you move your mouse pointer with the num keys) and I've tried pixel by pixel to ace level 4 and I still can't do it. I've been trying along the 10th or so row from the top of the screen (outside the game screen) for quite some time (I'm somewhere above "suicide" and to the left). So no, it is definitely not easy :(
The game is good in general (although I think collision detection is a bit flawed) but I think the impossible badge was a mistake. It's too trial-and-error based; which requires more luck and patience than actual skill.