I am proud to present my solo hobby project NAND. This year-long undertaking follows the completed Nand to Tetris course, but ported to the web with its own runtime, user interface, and IDE. You can try out some example programs I wrote in Jack on NAND such as 2048, a genetic algorithm, and a manual stack overflow to corrupt the screen.
Check out NAND at
https://nand.arhan.sh and its repository at
https://github.com/ArhanChaudhary/NANDAdditionally, I've authored an extensive writeup about the project. Read about it on the README.