Show HN: I built a dual crossword puzzle where two crosswords share one grid

Forkle (forkle.co.uk) is a daily word game where two thematically linked crosswords occupy the same grid simultaneously. Every tile contains two letters - one belonging to each puzzle - displayed as a diagonal colour split. Where the two puzzles intersect, some tiles share the same letter, giving you a foothold into both crosswords at once. The mechanic has two layers: the shared grid, and the connected themes. Each day's two crosswords are thematically paired around a central idea. For example,