Hi Siriluk,
First of all, I love the theme color of the layout you picked. It’s super neat and soft. I find your dashboard is easy to understand with all the key metrics provided. The dashboard shows all important information at a glance, including the scorecard showing the total number of cases. You have also provided the shortened, compact number of millions of cases, which helps avoid confusion for the reader. You gave a nice contrast in color for each country when creating the comparison chart, which helps the reader easily differentiate the data. The reset button and download button are very useful and It works well!
One suggestion from me is that many-digit numbers, such as those in the table, might be clearer if you add commas to them.
Thank you for sharing your great work!!