The example tile sheet in the article appears to be 8 pixels wide by my count. Count the width in pixels on the "m" and if it's 7 the font will likely work for you.
The main issue is you can't have them literally touching or it'll be really hard to read. Maybe it would work, but most of these "pixel art" fonts really benefit from some faking enabled by running on what's actually a high resolution display.
That's why I said the "m" should only be 7 bits wide for an 8 bit wide font.
It's a trade-off. Have every single instance of m look squished vs it might touch another m or w somewhere else and look odd.