I really liked the atmosphere, especially the background murmur of the crowd, it added a lot. I think this could be developed even further.
I found myself wanting to go upstairs as well. It might also be nice if the characters moved around more, and if occasional deaths could happen when the killer isn’t found in time, that could add some tension.
It could also be interesting if the target were randomized, so the game has more replay value.
Thanks for sharing it!