The beginning is really good to get you oriented because it can be a bit hard to find your way. The art style with the glowing "stars" in the walls and objects is quite unique and I really enjoyed it. It lends itself well to the genre and feel of the game, too.
This game is probably most on point about the theme of the jam than any other I've seen. The having to freeze is quite fun and tense as you don't know where the monster is coming from. After a while it also led to me freezing before I hear anything because my reaction speed was too slow so I was "expecting" a note soon and froze pre-emptively. It makes you quite tense and paranoid as to when that note is gonna come and it feels very fitting that you get scared in advance and just stop and listen.
However, the fullscreen didn't work for me and it was very hard to find my way around the maze, I didn't know where I had to go either (where exactly is the center? Do I have to go up or down or what?) It is fun that you can jump over many gaps but it was too hard to find out where I was going after a while, and after I dropped into a hole after getting very far, I gave up.
Overall, a super great game idea and great fit for the theme!