Some people are just really good at the game :D
You can watch the demo playthrough and look how long it takes. It is basically a perfect playthrough.
If you are aiming for the daily achievment, you can get it on either of the 3 gamemodes and if you are not able to beat the current leader, come back another time when the leadertime is lower.

Your time is the sum of two other times:
1. Total of animations playing time (constant).
2. Total of delays between animations.
Your job is to make the delays as short as possible. The key is to learn the optimal sequence of triggering elements of the puzzle. During longer animations you can rotate and zoom the model (sometimes you have to think ahead). And try to point next element with your mouse before animation stop.

Originally posted by Delfino:

Some daily records seem unbeatable to me. For example on normal timed 3 is at 3:27 which I can beat by few seconds (I found that fixed camera helps), but someone achieves for example 3:06. This seems unbeatable to me. Is there a trick to get such a time? I know the oder for every part I have no problems. It just takes too much time for the parts to develop to beat that time.

turn off camera following off. turn off animation speed up.
it will help a lot.

Originally posted by -=NE=-:

turn off camera following off. turn off animation speed up.
it will help a lot.

Good point!
In Settings/Game those parameters are called "Autofocus" and "Maximum Speed".

This guide and these topics will help you:

steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=272430605

steamhost.cn/steamcommunity_com/app/262410/discussions/0/1697169163402523646/

steamhost.cn/steamcommunity_com/app/262410/discussions/0/1698294337765423786/

This channel has videos about the Timed III achievement: youtube.com/channel/UC9gXpA1q0lI-tDU_k9floaA/videos

If you want to get the Serenity achievement (it gives you more points), do not mash buttons. Click on parts using the left mouse button to select and activate them, or use the left mouse button to select a part and the space bar to activate a part. Practice, correct camera angles, and fast clicking will improve your times.

Thanks guys!