Here's a single HTML page with a 300x300px Flappy Bird clone using JavaScript and Tailwind CSS. The game includes a welcome screen, retry button, hit counter, and point counter as requested:
Here's an HTML page with a New York Times-style crossword puzzle game containing 4 random words, as per your requirements. I've used vanilla JavaScript and CSS to keep it simple, but you can easily extend this with open-source libraries for enhanced aesthetics.