Very basic TETRIS game. Use left and right arrows to move the block left and right, down arrow to drop and space bar to rotate. You are given a few seconds to manouevre each block before it drops automatically and the game speeds up as you go along. Completed rows do not disappear (too complicated!) so the aim of the game is just to get a maximum score of 100.
The idea in designing the game was to keep track of filled positions on screen using a 10x10 matrix. However Scratch only provides lists (1-dimensional), so the 10x10 grid is created using a list of 100 items instead. Note that the block script is centred at the bottom left hand corner for all costumes. The block then occupies the grid positions to the right and above its x-y location. Marian
