Because the Hapland games are so much fun and unbelievably popular, I wanted to post a link to this similar game for you to try. Although not quite as well done as Robin Allen's games, Puzzleland is much easier and there are more levels to solve. Each level details the objectives you must meet to move on.
As with other games like this, the clicking sequence and timing is everything. You may need to reset a level if you do something incorrectly.
The game was created by Hanan Finnerty, and he promises to be working on a sequel with even more puzzles, levels, and a stronger story. In the meantime, have fun with this one.