Code Monster contains 58 short lessons that take students from the very basics of things like resizing and repositioning objects to complex creation of animations. Students can work through the lessons in sequence or jump directly to any of the lessons. Students receive instant feedback on each lesson because the code that they write and the results of the code are displayed side by side.
Applications for Education
Working through Code Monster from Crunchzilla could be a good way for students to be introduced to programming. Students don't have to register to use the service and they can stop a lesson and come right back to it whenever they want to.