SPOILER
I "finished" the game and I'm arrived at the point that all is WORK WORK WORK WORK.
I can't buy that this is the end, apart from the popup message, there are still the CREDITS unresolved and the coffee machine. I don't know, it feels deeper.
@mojiken there is a way to reset the game to try for more, or I've finished it and I'll only lose time?
I totally skipped the clock hint and judging by the other comments it was sheer luck I did it in time.
Anyway, great game, it was really fun and engaging, thanks!