Great game!
I was able to get both Tetris GB and Tetris DX cartridge recently, to use with an Analogue Pocket. I need to get my lazy self into action and research how 'save games/high scores' work on the cartridges themselves (like on the original had, I assume). Right now, my top scores are lost after each power off... I am assuming it's a battery that needs to be replaced.
I'm not even on the internet and I can comment here.