Yeah, the obvious way would be to draw the text on a canvas, but you wouldn't get sharp text then.
I could nest a span with a negative translate or negative margin to overlap. It could be worth it to print each letter in a css grid (which would work since all the text is monospace) making it super easy to overlap text.
There may be a more hacky/elegant solution which would be to use weird unicode to overlap characters, but I'm not sure how feasible it would be.