In the reward system update, I work on the reward of the system. The idea is to include a few achievements for fun, a few achievements related to the core mechanic, and a few hidden achievements.
The snapshot of this implementation in game Deep Sea are as follows:
* Time Traveler: The player has used two mechanic of tweaking times.
* Moved Around: The player has moved more than 10 meters in the lab.
* Have some Music (Hidden): The player is awarded a radio after solving critical puzzle.
The results are as shown below: