Let me start by mentioning that I'm not very fond of platform games. Never have been. They usually feel way to linear and restricted to me, and hardly ever offer exciting game mechanics.
While PixelJunk Eden technically is a platform game, this label wouldn't do much justice to it, as it truly is so much more! The game mechanics are simple yet innovative and the gameplay is very fluent. The player can move around freely over the entire map, explore every corner and in the meanwhile develop the map as it grows with you (by seeding plants).
No need to use the keyboard; the mouse does it all for you. This however doesn't mean it's a simple point-and-click game. Different combinations of mouse buttons make you jump in different ways and it all feels very natural.
The artwork is amazing and the 15 maps all offer something new. The minimal house music compliments the game very well.
Is there nothing negative to mention about the game? Of course, there always is. While the gameplay has the potential to be very relaxing, the timer that decreases your health can be stressful. You have to pick up crystals to recharge it, but these are not always around in the later stages of the map and it can be a little frustrating to die just before reaching your goal. In my opinion your health shouldn't be affected by time that much, but rather more by the enemies you have to defeat. These do some occasional damage, but more often interfere with your jumps.
Overall a very nice game with high replay value. You can play for just 10 minutes or for several hours, which makes it a game you can easily come back to. Even the main menu is fun to play around with.