Thanks for your feedback and kind words :D
We were aiming to make it a speedrunning game, yes. In fact you can see a small "1", "2" or "3" next to the timer while you're in a room, which corresponds to Gold, Silver or Bronze depending on how much time you're taking. We didn't have time to implement this system better than that, unfortunately :/ The balancing is probably off and the bug which make furniture disappear is also probably preventing the speedrunning from being as smooth as intended. But each level was designed with a "fastest" route in mind