A step ahead

The project to develop my own version of Tetris is progressing.,,

What I have done:

• function that generates a random tetromine
• function that rotates the current tetromine
• function that checks if the current tetromine hits the right wall
• function that checks if the current tetromine hits the left wall
• function that checks if a row is "full"
• function that deletes the full row and moves all blocks above the row down

What I'm doing but it still doesn't work

• handling the impact between the current tetromine and the ones on the bottom
• handling keyboard input (some keypresses are not detected)
• keep the game under 16k

What's missing

• Music
• High score
• Acceleration of the tetromines fall, progressing in the game