Your browser does not seem to support JavaScript. As a result, your viewing experience will be diminished, and you may not be able to execute some actions.
Please download a browser that supports JavaScript, or enable it if it's disabled (i.e. NoScript).
An user in the slack has reported, and I have reproduced, that the tutorial doesn't show any further prompts after the first creep is spawned (by copy-pasting the code in console).
Fixed. Thanks for reporting!