This is an interesting take on 3D Tetris, using rings that enable seeing through to obscured layers. This has appeared on HN previously in the submission https:

This is an interesting take on 3D Tetris, using rings that enable seeing through to obscured layers. This has appeared on HN previously in the submission https://nonzerosum.games/thetetriseffect.html https://nonzerosum.games/thetetriseffect.html which explores the Tetris Effect and the obscuring issue.