Turbo mode (hold shift whilst clicking flag). Press E to generate using Eller's algorithm, S for Sidewinder, R for recursive backtracker, W for Wilson's algorithm, or K for Kruskal's algorithm. Press C to fill the maze with colour (where the colour represents the distance to the top left corner).
http://weblog.jamisbuck.org/2011/2/7/maze-generation-algorithm-recap.html This blog was very interesting and helpful. The idea of 'filling the maze with colour' is from: https://bost.ocks.org/mike/algorithms/
