I'm a math teacher and I built a free Balatro-inspired game to teach linear equations in class

I've been teaching secondary school math as a substitute teacher in Spain while studying for the civil service teaching exams. Between lesson planning and exam prep, I spent the last few months building this.

\​

**Cardculus** is a free browser roguelite where you solve first-degree equations to score points and beat rounds — basically Balatro but with algebra instead of poker.

\​

**How it works:**

Each hand presents an equation. Pick the card with the correct value of x (or type it in) to earn chips and multipliers. Stack enough points before you run out of hands.

\​

**What's in it:**

\- 6 equation types — from basic ax+b=c up to brackets on both sides

\- 3 difficulty levels (designed for ages 12-16)

\- 12 jokers with unique effects, 8 relics

\- 14 collectable historical mathematicians with pixel art portraits

\- Permanent upgrades between runs

\- No install, works on mobile — just share a link with students

\​

I tested it with my students this week. They kept playing after class.

\​

It's completely free: **manuasg.itch.io/cardculus**

\​

Happy to hear feedback from anyone who tries it — especially teachers!