Alright, so having finally played the game and completed it, I have a few thoughts.
First thing I wanna say is congrats for developing and programming the project o your own. To put all that time, effort and energy into this is an accomplishment all on it's own and I really commend you for doing so.
Secondly, the art in this game, actual in-game assets and the separate art itself is beautiful. On a separate note, I've been following you since the old days on Y!Gallery and have been a huge fan so your quality would never be brought to question.
Third, the puzzles were a nice inclusion and made the game just a little more challenging then just gathering letters. There was one puzzle (The Model) that gave me a bit of trouble at first but I figured it out after a few minuets. But everything else, even the bottle puzzle, kind of clicked after a few seconds for me.
My last thing of note would have to be the platforming and movement in the game, and this is really the only critique I have. The character is pretty heavy to control at time, and the jumping it a little finicky. I think I spent more time getting frustrated trying to jump from platform to platform then with any of the puzzles. It's not terrible, but I'm glad that this game has gamepad support, because I don't know how much longer I would have gone using keyboard controls.
All in all, this was a super fun game with astounding art and well thought out puzzles. You said you plan to add more content in the future so I'm definitely looking forward to what else will be implemented later on.