I came up with these funky bonsai tree houses in the time since the last post. I like the idea of each bonsai tree house being a little island that you can visit. Each being a level that you have to solve in order to progress to the next one. We are not so sure about the last part but I think these cute houses may actually make it into the game in one way or another.
Later, after I worked on the above sketches, I found out that Takanori Aiba is quite well know for bonsai tree houses. His are a lot more impressive though. Make sure to check out his work as well > http://www.tokyogoodidea.com/bonsai-series/