This game is difficult to review because there's so much to think about in terms of story. The setting, atmosphere, and writing is superb. I truly felt like I was in the story - while I played, I could easily envision the feel of tower walls and the sounds evoked by the text. The thing I loved best about this game was that you could touch everything and get short descriptions of what you felt. Same with listening and smelling things when appropriate. As many senses as possible were engaged, and that is rare to see in the IF I've played.
The story itself, from what I could piece together of the hints, is a tragic one. The tower is symbolic of your character's inability to accept, to let go, to forgive himself. As you play through, there is a fun revelation going on, where each new discovery fleshes out the character's backstory more and more, but you never get anything really concrete. It's all implicit. Still, I found the character to be both sympathetic and likable. The tower is pretty small, but choices you make in terms of how you solve puzzles impacts the various endings.
The puzzles were intuitive. There was one that I got stuck on how to word my command. I knew what I wanted to do but had a devil of a time getting the game to understand me. I managed it in the end without hints, but it did cause some frustration. But don't let that put you off. I know which combination of choices produces my personal optimal ending, and having seen several of them, a little more of the backstory gets revealed the more endings you see. It's possible to finish the game without solving all the puzzles, but this produces a less satisfying ending. Puzzles are well-clued based on the writing, however, so it's not really possible to not know what to do. The puzzles feel natural and not intrusive, made to serve the story, just the way I like it.
I think this is a good beginning game; something that showcases what IF can be when it's done well; why there are people who choose to play a story in such a medium instead of one where things are explicitly drawn for them. IF should provide the immersion and escape of a good book, along with the emotional engagement and food for thought of great literature. This game does that, and it's short enough to replay for the endings. Everyone should give this a try.