I like this kind of puzzle games. That's not easy to make new levels, because each time you have to think about a brand new idea. It reminds me EnigmOn, a nice puzzle mobile game.
The Level 2 was nice, mabye too easy (I think it could have been improved by having 4 sentences in the text, the first starts with "D", the second with "O", etc. It would be still solvable, but less obvious).
The Level 3 too. I was almost able to find out myself, but I still needed 1 hint. I think the difficulty was perfectly balanced.
I also found every down in the menu. So it's 10 legit downs.
Then I felt so dumb needing the solution for the Elusive 12th Down, I like that kind of easter egg.
The Level 1 seems broken however. I wasn't able to solve any word at all even with the solution, I don't think anyone can figure out it by himself. Also kind of messy in comparison with other levels.
Apart of that I really liked the music, both tracks.
The art is simplistic but of course they will come after the concept, so at the beginning I didn't expect such an interesting game. I think you should really continue working on this game. Good job !