This is great! One improvement would be to not use an example that's "meta". Your example company is "YC Series A". It takes mental effort to separate the series A narrative that is your article, and the series A narrative that is your example company. This problem is at its worst on the "Use of funds" slide: "We're raising $50k to scale to supporting $1.5B in Series A funds raised annually." The couple of seconds spent in interpreting that correctly is an avoidable distraction.
Just avoid the common trope of examples that are "meta"!