In the applet version, you can see a green foot which - when you press run - changes into a message: "What is this room? Why am I here? Maybe you should should move me with the arrow keys". In the HTML 5 version, there is no foot and no message, movement doesn't work. You also can't pause the scenario. Music plays.
I am not sure but it could be that the creation of the image isn't working because it is an old scenario and probably uses the java.awt.Color and java.awt.Font classes which are not supported anymore.
By that scenario I was brought straight to the HTML5 version, which doesn't work. By other scenarios (I think, you said HTML5 might become default) I'm brought to the Applet version, which does work. So I'm brought to the not default, not working version of a scenario.
He linked the HTML 5 version (with the ?js=true in the end). That's why you are coming straight to that one.
I forgot this is his link that I'm going through.
Just uploaded a scenario through Google Chrome and keyboard actions were not available. Then, uploaded it again using IE, where keyboard actions worked.
Doesn't the uploading go from the scenario. How do you upload using a specific browser? (By changing the computer default browser?)