Gameplay Introduction: This is a game about old num tech. You need to use old numerical systems other than Arabic numerals, "Old Nums", to reach the target number you need to output, which is written in the bottom right corner. You can use the mouse to press buttons to input numbers in Arabic numerals, use "C" to delete numbers, and use "=" to output numbers. The output numbers will appear in an output bar, and you can learn how to use these numbers through comparison! When you output the target number, a "continue" will appear in the bottom right corner, and then you can proceed to the next level. If you find mouse input too troublesome, you can use the keyboard's number keys, Backspace, and Enter to input 1 to 0, C, and =. Of course, if you find learning these Old Nums too difficult, you can also observe the facial expression of the guy behind you who is listening to you, as well as the balance scale. If the guy looks disappointed or the scale tilts to the right, your guess is too small; if the guy laughs heartily or the scale tilts to the left, your guess is too big. This way, you can also solve the problem just by guessing.

玩法介绍：这是一款关于老旧数字技术的游戏。你需要使用阿拉伯数字之外的一些老的数字系统即Old Nums来达成右下角写的你需要输出的数字。你可以通过鼠标按下按钮以阿拉伯数字输入数字，用C删除数字，用=输出数字。输出的数字会在一个输出栏里面，你可以通过比较学习这些数字的使用方法！当你输出目标数字的时候右下角会由continue，然后你就可以到下一关去了。

如果你觉得鼠标输入太麻烦。可以使用键盘的数字键，backspace，enter进行1到0，C和=号的输出。

当然，如果你觉得学习这些old nums太难，你也可以观察后面听你说话的哥们的脸色和天平，如果哥们失望或者天平右倾，则你猜的太小，哥们大笑或者天平左倾，你猜的太大，这样只用猜测同样可以解决问题。

A little background and some thoughts on the development:

This is my second LDJam entry. The "old tech" theme is both fascinating and deeply historical. I originally planned to make a game about currency—after all, currency has a long history as "old tech." But it eventually evolved into "old nums" instead.

The main reason was that the Mayan and Babylonian numeral systems are truly unique. Also, while I was recently learning Arabic, I realized that Arabic-speaking regions actually don't use the 1-2-3-4-5-6-7-8-9-0 that I call "Arabic numerals." That’s how this project gradually came to life.

I wrote a little background melody for each small scene (though they're quite rudimentary). Among all the numeral systems, I found the Mayan one the hardest. Because of this, I ended up drawing lots of custom fonts during development, such as Mayan numerals, Eastern Arabic numerals, and Babylonian numerals. The levels cover Roman, Arabic, Mayan, Chinese, Babylonian, and even binary. Overall, they turned out to be really fun levels.

Since I'm Chinese, I can easily read the Chinese characters, which is exactly what makes these old systems so interesting. If a Mayan or an ancient Babylonian were playing, they'd probably find their respective puzzles just as easy.

Thanks for playing! Feel free to leave a comment letting me know which level's numerals you found the most complicated! If you're a numbers whiz and speedran through them, I'd love to hear about that too! And of course, if you spot any errors in the numeral systems, please let me know in the comments!

(Due to technical constraints, while the Chinese numerals in this game are written correctly from right to left, the "row-first-then-column" order is actually incorrect. In ancient China, the order was generally "column-first-then-row," from right to left.)

一些开发的背景和想说的：这是我的第二个ldjam作品，old tech这个主题很有趣也很历史。 我一开始打算做货币，毕竟货币作为oldtech历史悠久。结果最后变成了old nums。主要是玛雅和巴比伦的进制真的很特别，加上我前阵子在接触阿拉伯语的时候才发现阿拉伯地区尽然不用我称之为阿拉伯数字的1234567890，于是这个作品就逐渐诞生了。我基本上为每个小场景写了一点点背景旋律（虽然过于简陋了）， 整个进制里我觉得玛雅最难，在开发过程中我也因此绘制了很多字体，比如玛雅数字，东阿拉伯数字和巴比伦数字。整个关卡变成了 罗马，阿拉伯，玛雅，中国，巴比伦以及一个二进制。总之是很有趣的关卡了。 由于是中国人我对于中国汉字就能很轻易的看懂，这也是这些老旧系统很有趣的一点。如果一个玛雅人或者古巴比伦人，或许他们也会觉得这些谜题太简单了。

感谢你的游玩，欢迎留下你们觉得哪个关卡的数字最复杂的留言！如果你是数字大师直接速通这些数字也欢迎留言！如果你发现部分进制错误也欢迎留言！（由于技术原因，其实这个游戏的中文数字从右往左是正确但是先行后列的顺序其实是不正确的，中文一般在古代也是先列后行，从右到左的顺序）。