On the 'java update' panel, you should be able to click on "Later" and it should continue with loading the scenario.
I now saw the link and looked at it. The run button can be clicked on and it becomes a pause button, and it can be paused as well. Maybe you could show the code you are using.
I have downloaded the scenario and will take a look-see.
I should probably make a separate scenario for uploading without all the extras.
There is another possibility. You have some foreign characters in comment lines in the MyWorld and Text classes that may be the cause of the issue.
What is "userIcon.png", is it something that I'm supposed to have or is it just there as an example and I'm supposed to put an image there.
Also, I don't have a "storage.csv" file am I supposed to , and what do I do with it once I get it.
Now a "storage.csv" file popped up even though last time I checked for it (in my first screenSize) it wasn't there.
When I uploaded the scenario there was nothing in the high score table, then I uploaded it again to fix something else and it was there. Can you check to see if it works by you? (Press 'H')