Cool! A lot like World of Goo mechanically. I think this game would go great on mobile devices. Some of the physics is weird especially with balloons, I had them completely invert and collapse my bridge because I used too many of them, also sometimes the end points of the wood planks would split off when there was a lot of force applied. Overall really simple to understand and play, though level 3 was a LOT harder than the first two, I was still able to make it through and had a nice time, the sound and especially the music is really good.