It's like that Simon Says game. You have to complete all the previous steps plus the current one in order to progress to the randomcatfireworksratingsplosionbutton final stage, at which point you are deemed worthy of conquering the app store. If only I could get some kind of Mozilla Appmaker certification badge...

Yer I added a star rating and clicked the 1, nothing happened, gave up.

I think you need to add a button. Same thing in level 4 with fireworks.

I added a star gadget and a submit button. No joy.