Played both as per the recommendation. This is very well done, although the the difficulty really is subjective, because after playing the first one it made certain puzzles in here just click easier. It took me an hour, instead of two like the last one. Not to say this didn't come with more unique and interesting challenges.
Either way though, proud to say I didn't need a walkthrough for this, just a couple sites so I didn't have to do certain things by hand. The secret ending i guess I have to leave for another day, but I may be PMing you (to avoid spoilers) about that final question. Because SERIOUSLY, that 3rd letter bro really. I'm lucky I got the rest of it and was able to piece it together.
Either way, great game with great lore, music and puzzles.
Hope you keep doing what you love and would love to see more from you in the future.