If you enjoyed games like Machinarium, Alchemia or even Dear Esther you'll definitely love this. It also shares alot of atmospheric similarities with Limbo even if the atmosphere itself is the complete opposite.
It's is a hautingly beautiful audio-visual experience with a heartwarming story and soundtrack and after finishing it a second time I just felt like posting it here.
Here's the trailer:
Botanicula - Official TrailerOh and the producers were so generous and dispensed with copy protection. I think that's a sufficient argument to support them.