Alice is impressive, and you can see the obvious programming influence, but it seems like "Moviemaker with control flow and objects" more than anything else. What problem is it trying to solve?
For me, the hardest part of learning elementary computer science was not things like OOP or if-statements, it was data structures, algorithms, and the difficulty of keeping many different interactions in your headspace. It seems like in many CS programs, the data structures or algorithms class is the "weeder" that separates the CS majors from the wannabe CS majors. Personally, I believe the drop-off at this level is more important to address than how many students enroll in CS 101.