Hi Dew,
You can try cleaning your saves (making sure you wiped the offline website data completely clean) and start over or try another browser for the browser version. Make sure you keep your save files to a maximum of 3-4 slots. More than that freezes the game.
For the download version, if you set your text to instant, it will freeze due to live2d sprites. Try pressing ctrl for skipping instead of fast mouse clicks. 🙂 let me know if any of those work for you!