I absolutely loved The Company of Myself, and I must say this is a wonderful prequel. The story is very engaging, and the puzzles are well designed. The puzzles are fairly intuitive, and I'm glad that you trusted your audience to be smart enough not to include a tutorial at every single step (although for some places like the rain it might have been useful to get a hint).
The visual style works well. There is a very nice variety in the levels and I never got bored of any one particular set.
The one thing that bothered me about the puzzles, and Company of Myself suffers from the same problem, is that sometimes certain elements will be used only a few times (for example, the rain) and so learning the mechanic was a waste of time.
The story overall is well paced, but in some parts it felt a little slow, and I found myself missing parts because I was progressing through the level too quickly. The dialogue was very lengthy but not very engaging. Perhaps something like voices could help players in that sense.
Finally, I absolutely loved the character development and ultimately the tie to The Company of Myself. A wonderful payoff, and a great game overall