Hi qucko! It can depend on the browser but we have seen it take up to a minute on white screen before the loading percentages appear. We have no idea what causes it - Jonathan just tried it on their firefox browser and it took about 30 seconds. It's definitely not an optimal browser game experience across the board. We can try looking into it on our end but for now our only advice is to try another browser or device, such as a phone or tablet. Thanks for getting in touch about this though!