The mechanic (platformer mode) : The player is on Venus, and when he stays too long exposed to the sun, he will get radiations and die after a while. To combat this, we can go underground to refill his radiation bar.
How will you introduce your mechanic?
Will spawn the player underground, with a friend (NPC), when leaving the cave, the friend will go before you (forcing the player to stop), and there will be a sequence of him going back in the cave and telling you about it. When it is your turn to leave, you'll have a horizontal greenbar, (that represents the radiations taken), it will turn red when exposed (and lower down obviously), it will turn back green when back on a cave, it will be yellow however if the player is below 50%. Also, when the player is exposed and down to its last 20%, the entire screen will be covered with the text "Find a safe spot" (low oppacity to not be annoying) (entire screen, so it feels like a spacesuit).
How will the mechanic influence the gameplay loop of your level?
You'll have to be fast to reach the next safe spot. The loop will be : safespot -> Exposed, have to go fast -> safespot / alternatively, safespot -> Exposed -> Die -> Retry
idrk when to say this but :the plater gets a checkpoint at save spots (every save spots at the beggining, and then less and less, to build up hard sections)
How will you create a feedback loop to communicate the effects of the mechanic to the player?
The screen coloring will shift a bit more red, and the more exposed you are, the more red it will turn, when reaching 50%, you'll get a noise like "warning", and when reaching the 20%, you'll get a lot of noise, like an alarm kind deal (which can be toggled off in settings), in addition to what I said earlier.
Once again, 2 messages for text length