Hi killereks,
Thanks for your comment. This is very helpful.
In fullscreen it was OK for me because the 'indicator' green had enough contrast. But in the 'small' browserwindow you are right of course. Maybe I can make the text bigger a bit as well. I will check my options and change this in the next update.
There are limited (and expensive) upgrades for speed because the click/idle balance breaks very easy. It will get better after some prestiges. :-) But I will have an eye on it.
Thanks again and have fun with the game.