The vertical scroll bar can be used to change the tilt of the maze. Check "Square rooms" or "Hexagonal rooms" to change the style of maze. After a maze with square rooms is drawn, you can use the arrow keys to solve it. After a maze with hexagonal rooms is drawn, you can use the Home, Up Arrow, PgUp, End, Down Arrow, and PgDn keys (or the corresponding numbers)
to solve it. If those keys are laid out on your numeric keypad as follows:

the direction of movement in the applet will correspond to the direction of the key from "5" on the keypad. Each maze has exactly one solution that does not involve backtracking (passing through a doorway more than once).