Thanks!
I made it so once you spot an anomaly, it does not come again. There are 30 anomalies so hopefully you see only different ones in a single playthrough.
Working on a post jam version for Steam, I added a zoom functionnality, so you can have a better look at the anomalies that are in the cell or on the ceiling.
I've been told multiple times the game might be too hard, I hoped that the hint system would help, but maybe I should remove some of the hardest anomalies.