This is a part of a series of "Grow" games, listed on Jayis games here: http://jayisgames.com/archives/2007/09/grow_island.php If MfJuls created this, then why hasn't he uploaded the entire series?
ProTip: There is no ambiguity, be greedy with the paths. If you have a choice between more than one path, choose the one that is furthest away from any empty blocks.