I am creating a tetris game in C++ & SDL, and I'm trying to do it "good" by making it object-oriented and keeping scopes small. So far I have the following structure:

• A main with some lowlevel SDL set up and handling input
• A game class that keeps track of score and provides the interface for main (move block down, etc)
• A map class that keeps track of the current game field, which blocks are where. Used by the game class.
• A block class that consists of the current falling block, used by game.
• A renderer class abstracting low level SDL to a format where you render "tetris blocks". Used by map and block.

Now I have a though time where to place the time-management of this game. For example, where should be decided when a block bumps the bottom of the screen how long it takes the current block locks in place and a new block spawns?

I also have an other unrelated question, is there some place where you can find some standard data on tetris like standard score tables, rulesets, timings, etc?