I'd love to see 10x 100x on upgrades (especially the time and damage upgrades, where I now gather currency in T, but have to click hundreds of times to upgrade time)
I am experiencing a bug where the upgrade screen doesn't move around anymore... I refreshed the page - it didn't help... Besides it says I collected 150 out of 152 upgrades on the upgrade screen, whereas I collected only 79 (as the badge says).
One suggestion to developer - instead of 'End now', which apparently doesn't do you any good, it would be better to have speed up button or something similar, that would just speed up play of ai players and not affect your final score.
Another thing is achievements, which you get from time to time, but I can't see a full list of them and if I got them all already:/
The solution for the problem with the medium badge is to open different browser and play chapters that haven't been checked. It worked for me - I usually play on Firefox and I changed for IE.