Made DX version available as a choice now. The DX version will not work on a DMG gameboy so be aware of that before purchase. 

Tetris - Rosy Retrospection” aims to combine the joyful nostalgia of playing classic GameBoy Tetris with the established comfort of modern gameplay mechanics. 

Rosy Retrospection includes a lot of additions and improvements.

Implement Super Rotation System
Shadow piece
Three previews
Use SELECT to hold
7-Bag with new pseudo-random number generator
“Hard drop” and saving from “Classic Harddrop” hack
Redesigned screen layout
New demos
Award spin clears
Faster “delayed auto shift”
Lock delay
Faster line clear
Extend the field by four invisible lines
New game over condition
Adjust difficulty
Higher start location
Fix two bugs in the original game

In addition to hard drop and saving, it includes all the other features of the “Classic Harddrop” hack:

No more waiting for rockets and disclaimers (START to skip)
Independent Highscores for ‘Heart Levels’
Character input recalls the last name entered
Pressing B at name input deletes the current character