The rooms mostly seem big and empty (even Kelly's). The blobs seem to come evenly from all directions, so it seems unwise to leave kelly's room, or at least to go far away from it, after the first blobs reach kelly's room. Getting attacked by the blobs in every room except kelly's further reinforces this.
Also, every thing looks rather featureless: all the rooms look the same (kelly's room is only distinguished by having kelly in it) and the blobs look all alike. this is very boring.
Reducing the game to only kelly's room would be the best thing to do in my opinion. The extra rooms hardly add any value, and taking them out would pull all the details that are there closer together and highlight them.