This is my first Ludum Dare and my first game jam. I think it's going to be an unforgettable journey. Regarding the theme, I made a game about punched cards.

HOLLERITH — You're a rookie at the 1890 census sorting machine, and you have seven days to complete your training, followed by an assessment on the eighth day.

It might feel more like a math problem, but the short time limit in later levels might make you misjudge things.

If you're interested, you can play it here:

https://ldjam.com/events/ludum-dare/60/hollerith

Feedback is very welcome, especially about the difficulty curve — some of my friends said it started getting challenging on day 4, but honestly, I still can't tell if that's too early or just right.