I honestly love this game. It's a platformer with logical and action elements, the puzzles usually revolve around shifting gravity or moving the objects. All three gameplay types are perfectly blended together, the game flows very well and you don't get stuck often. Because of that, some people may consider it easy. That's why there's a DLC with higher difficulty. For me, it was very pleasant to be able to play without getting frustrated, which is a downside of many great and challenging games.
As for the graphical side, I can't complain. Rochard is somewhat cartoonish, but very pleasant to look at and rich, colorful. Music and sound effect are well-done too. But what I really love is the main character. I grew sick of the manly, model-like and virtuous main characters who lack character that appear in many current games . John Rochard, on the other hand, is a man around 40 whose figure is far from perfect. He is funny, but not in an obtrusive way. His voice acting is great and he's very easy to identify with. Even the other characters are well-done, all are very believable.
Even though I think the game is worth the original price, if you are not sure whether to buy it, wait for a sale. But definitely buy it, it's worth it.