A downloadable game for Windows

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Rullo is a simple math puzzle game where you have a board full of numbers. The goal is to make the sum of numbers in each row and column equal to the answer in the box. Turn on/off the numbers by clicking on them.

There are 2 game modes: Classic and Endless. In Classic mode you can choose which board size and difficulty you want to play. In Endless mode you will be given a puzzle with random size and difficulty.

Your total wins in any mode will be recorded. The puzzle is randomly generated so you'll never get bored of playing.

Android and iOS versions are also available and have more features.

Visit crescentyr.com/rullo!

Send your questions and bug reports to contact@crescentyr.com!

"One of those games that follow the concept of simple rules, but challenging game."
- JayIsGames


  • Left Click: Turn a number on/off.
  • Right Click: Lock a number.

More information

Published 137 days ago
Tags2D, circle, Education, Endless, line, math, Minimalist, Mouse only, number, Relaxing
Average sessionA few minutes


Download NowName your own price

Click download now to get access to the following files:

Rullo v1.2.4.win.zip 6 MB

Also available on

Development log


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So that looks cool and everything, but whenever I try to launch it (Windows 10, version 1607) I get the following message:


and the game closes.

Sorry about that! We'll look into it.

Just updated to version 1703. Works great now!