needs better grow functions. If you bush up you cant reach all the crosses.
Also: "Flowers"? Shouldn't that rather be blossoms? And blossoms can flower even without leaves... you have to rework that part for sure.
Awww, please make the info boxes ("thank you for visiting", etc) non-modal dialoges. This means you should be able to simply click anywhere to get rid off it. or be able to disable it in the first place - if i click a friend and see his constructions unfinished, i click em. easy as pie, dont has to tell me to do so.