My nephew’s trying to learn Mario Paint, seen here running off of the original cart in 1080p, 8:7 aspect ratio via an Analogue Super NT. Using a Hyperkin optical mouse instead of the official Nintendo ball mouse.

Mario Paint drawing showing some brush liens in red with some car-shaped stamps on a white canvas with stumpier scan lines on it to mimic a CRT display. A toolbar is visible above and below the canvas.