Very Good!!!

Solid puzzle game! Fans of 'I spy' and 'hidden picture' games should get a kick out of this.
The biggest problem I had with i was the waiting. When you start the game, it takes a long time to render the board, and each pattern takes a pretty long time to load.

Something about the art direction made the game feel off as well. I think it was probably due to the flat colors, it just made all the tiles blend together. This may have been intentional to add difficulty, but I think the game would have been more enjoyable with the introduction of more contrast, and sharper tiles.

It did take me a while to figure out how to play this as well. Whenever I see a grid based puzzle game my instinct is to click the tiles and make something happen. I wanted to just click every tile in the pattern to solve the game, but after several attempts I realized you needed to drag the little tile shape thing from the left.

If you decide to polish this game, be sure to add some instruction (maybe a small animation on the title screen). I would also suggest maybe using a smaller grid for the first few levels and have the grid grow as the player masters the game.

I really hope you take this idea to the next level. I think you could have a hit game here!

Great Game, fun and easy, congratulations.