in the course of a few conversations with my wife about folk tales (on a thread which began a while ago with Vladímir Propp's book) an idea started to take shape, and i revisited this drawing of a world and some related ones of a princess and a frog.  the princess immediately got pretty boring but there was something about the frog.  so over the past week i've been gradually building this little prototype:

Click on the game screen to control the frog.