Lock and Key

This is an experiment on secret mechanics that give the illusion of choice

The objective is to get to the antidote (green circle on the top right) before time runs out. First, the player must pick up keys (the colorful circles) to try to unlock the door by bringing the key to the control panel (dark grey box). The player will have to try many keys to find which one will unlock the door before the time runs out.

However, I specifically programmed it so that you can only find the right key once you don't have enough time to get to the green dot.