Oh ********* I did it :=)
The first day I was loosing time doing a gamebook based on ancient civilization. Luckily a cool guy at a stream (I am very productive you know) told me it was about ancient technology.
I tried to make a fake calculator based on ancient number representation. It was fun, and not so hard, so here I am. I finished another ludum dare 3 years after the first one. ๐