Fun game, really nice UI/UX and good progression system. There is some missing English translations, leaving parts in French but nothing that's too critical.
I'd recommend adding a scale setting, playing on a 2560x1600 monitor makes a lot of the text really small and almost impossible to read.
It would be good to have something else to look at instead of the upgrade screens, a chart that shows your balance with candles/wicks would be cool. Like looking at a price chart of a token but you have direct impact.