Click to start. Space to edit the map. Click on the tiles to change them. Space again to have the frog find the end. Green lily pads are where the frog walks. Grey rocks are walls. The red lily pad is the start. The gift box is the finish.
I learned the theory behind path finding (on Khan Academy) and decided to make my own. Frog, Rock, Lily Pad, and Gift Box images are from the Scratch image library. Everything else by me. This is pretty efficient. It requires 4 lists: 1 for the map data, and 3 for the path finding. It uses 6 variable: 2 for the map size, 4 for the path finding. The Path Finder uses only 7 scripts, the Map uses 3, and 2 scripts are for the Title sprite.