# App for drilling addition problems
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Uses sudoku-like "sum grid" puzzles.

![demo](assets/1.gif)

This repo is an example of a [Freewheeling App](http://akkartik.name/freewheeling),
designed above all to be easy to run, easy to modify and easy to share.

## Getting started

Install [LÖVE](https://love2d.org). It's just a 5MB download, open-source and
extremely well-behaved.

[Run the app using LÖVE.](https://love2d.org/wiki/Getting_Started#Running_Games)

## Hacking

To modify it live without restarting the app each time, download [the driver
app](https://git.sr.ht/~akkartik/driver.love). Here's an example session
using a different freewheeling app:

![making changes without restarting the app](assets/2.gif)

[Some reference documentation on how to create your own apps.](reference.md)

If the app being modified by the driver lives in a .love file, your changes
will go into the [save directory](https://love2d.org/wiki/love.filesystem.getSaveDirectory).
If it lives in a directory (like this repo), your changes will go straight
into the same directory.

## Keyboard shortcuts

* `ctrl+n` to generate a new problem
* `\`` to reveal/hide the solution (I should probably disable this before
  putting it in front of the kids.)

Exclusively tested so far with a US keyboard layout. If
you use a different layout, please let me know if things worked, or if you
found anything amiss: http://akkartik.name/contact

## Known issues

## Mirrors and Forks

This repo is a fork of [lines.love](http://akkartik.name/lines.html), an
editor for plain text where you can also seamlessly insert line drawings.
Its immediate upstream is [the template repo for freewheeling apps](https://git.sr.ht/~akkartik/template-live-editor).
Updates to it can be downloaded from the following mirrors:

* https://git.sr.ht/~akkartik/sum-grid.love
* https://tildegit.org/akkartik/sum-grid.love
* https://git.merveilles.town/akkartik/sum-grid.love
* https://nest.pijul.com/akkartik/sum-grid.love (using the Pijul version control system)

Further forks are encouraged. If you show me your fork, I'll link to it here.

## Feedback

[Most appreciated.](http://akkartik.name/contact) Messages, PRs, patches,
forks, it's all good.