dtgreene: Imagine this combination of mechanics:
* The game is a linear stage-based game. You play through the first stage, complete it, and then go to the next, and so on. In particular, there is no back tracking.
* There's a time limit on each stage, much like in arcade games and the early console games that came from them (including Mario games). (Alternatively, we could make the entire game an autoscroller.)
* Killing enemies gives you experience, and when you get enough, you gain a level. At higher levels, you become more powerful, making the game easier. (In particular, the later stages of the game are not manageable at low levels.) The level cap is high enough to not be reached easily, or at least not early in the game.
* You are given 3 lives. If you die, you lose a life and are sent back to the beginning of the stage, or to a checkpoint in the middle of the stage. If you lose all of your lives, that's game over, and you have to start back from the beginning. There are extra lives hidden at various spots in the game.
* When you die and respawn, you are sent back to level 1, with no experience points.
* The game isn't long; a successful casual playthrough takes less than an hour. However, the game is difficult enough that it will take some time for a new player to get good enough to complete the game.
So, what do you think of this combination of mechanics?
There were many games following a combination of these or similar limits back in the day.
*) Stage-based? Check.
*) Stage time limit? Not directly per stage, but there is a time limit of 1 hour to finish the entire game.
*) Experience and levels? Nope.
*) 3 lives? No, but you had 3 hit points so you could be hit twice before dying. You have infinite lives but every time you die (which can happen very quickly since traps and big falls instakill you) you get sent back to the beginning of the stage. So you need to git gud or you won't beat the time limit.
*) Short? Check. You have to beat the game within 1 hour.