This was a very simple, but fun and engaging game regardless! The puzzle mechanic was simple (just avoid the giant Ds/other souls), find the keys, and get through the mazes, but each level had plenty of variation to keep me engaged. The visuals were simple but still pleasant, and given the straightforward nature of the game, it complimented what was going on perfectly. I also enjoyed the music that was selected for the background, and the sound effects were a great choice as well.
I do wish that the game saved after each level, because if you close the game and open it up again, you have to do the whole game all over again. Also, near the end of the game (I believe?) there's this puzzle where you have to get through the maze as another lost soul chases you. I found the timing was really tight, and while it makes sense for a puzzle near the end of the game, I think if the soul was a little bit slower that would help, as sometimes I would end up bumping up against a few corners and end up caught with how fast the soul caught up to me.
This was a lovely little puzzle game, and I really like the ASCII art style you went for. Good work!