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[iPhoneDevelopment]

Does this look righto to you then?

-(void)createFirstBlock{
		
    if (blockArray==nil){
		blockArray = [[NSMutableArray alloc] init]; }
	
    UIImage *blockImage = [UIImage imageNamed:@"block.png"];
	UIImageView *block;
	
	for (int i = 0; i< 1; i++){
		block = [[UIImageView alloc] initWithImage: blockImage];
	
        int x = arc4random()%320; 
        int y = -500;
        block.center = CGPointMake (x,y);
		
        [self.view addSubview: block];
        [blockArray addObject: block];
        [block release];
	}
}

-(void)addOneBlock {
	
	UIImage *blockImage = [UIImage imageNamed:@"block.png"];
	UIImageView *block;
	block= [[UIImageView alloc] initWithImage: blockImage];
	
	//pick a position *above* the top of the screen
	int x = arc4random()%320; 
	int y = -500; // place at top of the screen
	block.center = CGPointMake (x,y);
	
	[self.view addSubview: block];
	[blockArray addObject: block];
	[block release];
}
	
-(void)moveBlocks {
	
	if(gameState == kGameStateRunning) {
		
		for (UIImageView *block in blockArray) {
			
			//move new center down
			CGPoint newCenter = block.center;
			newCenter.y = newCenter.y +10;
			
			if (newCenter.y > 420) {
				
				if (stoppedBlocks==nil){
					stoppedBlocks = [[NSMutableArray alloc] init]; }
				
				newCenter.y = newCenter.y -10;
				[stoppedBlocks addObject: block];
				[self addOneBlock];
				continue;
				[blockArray removeObjectsInArray: stoppedBlocks];
			}
				block.center = newCenter; }
}

	else {
		if (showPlay.hidden) {
			showPlay.hidden = NO;}
		if (showInstructions.hidden) {
			showInstructions.hidden = NO;}
		if (showOpenfeint.hidden) {
			showOpenfeint.hidden = NO;}
		}
}