For anyone playing here are a few hints:
Time is important, but you can get 1 of the 3 endings even if you run out of time, so it's not a 100% fail state, it's only a fail state for 2 of the 3 endings.
On the counter with the computer there is also a radio that you can turn on and off :)
If a painting has a glitched admiration meter, there is something else that needs to be done to check that painting off the list.