Classic Block Master

How to play?
There are two modes of operation: touch mode and button mode.
Touch mode: tap the screen to rotate the blocks, swipe the screen left and right to move the blocks horizontally left and right, and swipe the screen down to speed up the falling blocks.
Button mode: After the button mode is activated, you can tap the 4 buttons at the bottom of the screen to move left and right, rotate and speed up the falling blocks.
How to score?
The player should arrange the blocks horizontally until the lines disappear.
Stack the blocks by moving and rotating them to fill the squares.
You can keep any block to use later in the game. But only one block can be kept, and when a new block is kept, the old reserved block will fall immediately.
The game continues after each level, causing the blocks to fall faster.
The game ends when you reach the top of the playing field and there are no new blocks to enter.