My first major project was building a series of circuits into a simple game within the renowned game
Minecraft.
The in-game mechanic of
"redstone" accurately mimics the logic of electrical circuits and, for those curious enough, turns this game into a 3D circuit simulation.
After three years of learning everything about
logic gates (AND, OR, NOT, ...),
circuits (adders, 7-segment displays, PRNGs, ...), and design, I finished implementing the classic gym-class game
"Prey vs Predator" within Minecraft!
After learning how to program in html and javascript, this 2-3 year long project took about 2-3 days... time well spent!