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Interesting work. How ever there are already many games like this. Yours does stand out with the style and graphics that you chose to incorporate into your work, but thats only eye candy. The puzzle aspect of this game could be somewhat improved. I like the fact that I do not have to click on every single pixel on the screen to solve the puzzle. However it feels that I search for only a minimal amount of time trying to solve your puzzles. This bores me =/. You could also incorporate the disabling of the tab key in your code fun.
In short: It's aesthetically pleasing, but the basic principle of the game Isn't anything new. Try and incorporate some other elements into these types of games no one has done before.
One thing you could do is disable to the tab key to