Turn on grids by going to View > Show > Grid
Use the line tool to draw horizontal and vertical lines (make them on separate layers).
Add a start and a finish point.
On a new layer, draw a red line going from start to finish. Keep inside the grid, keep the lines vertical and horizontal.
Erase all of the black lines that the red line crosses. It's best to have a very light guide of the vertical and horizontal lines on a different layer.
Create a new layer, and draw green lines that do not lead from start to finish.
Delete all of the black lines that the green lines cross, just as you did for the red.
Hide the layers consisting of red and green lines and your light guide. Then save. Make the red lines visible and save another document, to show how you get to finish.
I also cropped mine, because, you'll notice, it wasn't even.
- Pay attention to where your red and green lines connect: You could accidentally make your maze too easy. Put big yellow dots where the red and green connect if necessary.
- Double check your maze to make sure all of the black lines that the red or green lines cross are deleted,--no more, no less,--or you could accidentally make your maze too easy or impossible.
- To add a level of difficulty, make one or more green line really long. Make it look like it will reach finish. This could trick the person into think (s)he is following the correct path.
- To add a level of difficulty, make some green lines come from finish, but that do not reach start or connect with the red line. This way, if the person tries to solve the maze backwards, they can't get it done any easier than if they did it the right way.