In PixelJunk Eden, you play as an organism that is bent on collecting Spectra to bring life to its own Eden. It goes about this task by visiting different worlds to fetch them. Its only tool is its ability to use a thread of silk to swing from soft surfaces. Once you start of PixelJunk, you'll notice that the game is quite simplistic. Once you get past the first menu, most things are accessed during gameplay. Your little guy can latch onto nearly every structure in the game, most of which he can also swing from with his thread of silk.
Your primary goal is simply to find the given amount of Spectra in a level. From this goal branches two sub-goals: Find pollen to sprout seeds, and collect crystals to extend the amount of time you can stay there. On the bottom left portion of the screen sits a bar, that gradually depletes as you play. Once the bar reaches zero, you fail the world and have to try again. To replenish the bar's energy, you have to collect crystals.
Spectra are generally very high up, or in places impossible to reach when you first enter a level. To "unlock" more of the level, you have to build your own path up by collecting pollen, which is dropped by Prowlers (floating enemies that come in a variety of shapes and sizes), and giving it to the dozens of seeds sitting around the level. Once a seed has collected enough pollen, you can touch it to sprout it, giving rapid birth to a new plant that you can climb up, allowing you to reach new heights, and consequently bringing you that much closer to grabbing the Spectra.
The graphics style of PixelJunk Eden is very colorful and interesting. Each world has a different palette and style, and though the game takes a while to grow on you, It will. Eventually I found myself looking forward to each new world to try, and couldn't help smiling whenever I found innovative new ways to reach each Spectra. With each one you collect, a new piece of scenery will sprout forth in your Eden, allowing you to reach new worlds.
Overall, the game is very simple, yet fun at its core, and just a good way to pass the time. I think it was worth $5, but I wouldn't have paid much more for it.
The game also has three player co-op multiplayer and trophies, but they are ridiculously difficult to obtain, with little payback. Grabbing every single spectra is one of the simpler tasks at hand. And since the game not only lacks a platinum trophy, but only has mostly bronze, with a couple silvers tossed in (no golds), I just don't see much reward in it beyond bragging rights. A 7.5/10.