Nice to see the Original Game Boy get some loving:

INTO THE BLUE is a new puzzle game for the Game Boy. It plays similar to Tetris Attack (or Panel de Pon, as purists would say) and comes with all the features you would expect of an officially released game from back in the day.
Features:

  • 9 Speed levels
  • 3 Difficulty levels
  • 3 In-game songs (plus 1 title song)
  • 1 Competitive mode for 2 players

https://the-green-screen.com/

via http://www.romhacking.net/forum/index.php?topic=26727