I had this game idea/concept for a while, and it's more like a game-changing idea.
The idea was game characters or worlds where increasing in size is a gameplay consideration. The world itself and the puzzles and challenges presented are solved or completely modified by the increase. An example would be Katamari Damacy where growth was the goal. There's also Spore cell stage, where each growth changed the enemies you faced. Larger enemies became targets, small enemies became food.
So where am I going with this? I just wanted to apply it to particular genres and see what people think.
The first is platformers. Like Mario when he gets the mushroom, he's twice as tall, and can break bricks, but now he can't get into small gaps. Imagine if the second one he ate also worked. Suddently he's 4 bricks high, there's more gaps he can't get into, but now he can jump over obstacles that he couldn't before. Certain enemies would be weaker. Then if he got another mushroom he would be 8 squares tall, a giant amongst goombas. Forget about entering pipes, but there's a whole new giant world to explore.
The other genre that would be interesting: Tower Defense. As the player defends against the oncoming horde, the playfield slowly zooms out. At first there's some enemies that are twice regular size, and the player has to work harder to defeat them. But he can also upgrade his towers so they are also twice the size.
Soon it's an arms race, upgrade the towers fast enough while bigger and bigger enemies arrive while old, smaller towers become less and less effective. If the player can't upgrade his towers fast enough he falls behind, but he needs to place enough to kill the enemy, always knowing that the towers he places will be useless quite soon, and new, much larger towers will be needed that dwarf the old towers. The new enemies would also ignore the old barriers that limited their smaller siblings, so the path they would take would be more open, harder to defend. This is definately a concept that could be fun.
I'm also concepting up a match 3, or columns type puzzle game that could use a growth/zoom/doubling mechanic. How it would work I'm not sure on right now.
So what other genres, games or gameplay types could this concept be applied to? Anything where the increase isn't just minor, but many factors of 2, stacking on each other, perhaps even indefinately.