Make Games with Flowlab!
My current 10th grade students have been experimenting with the free version for about 3 weeks and we are poised to dig deeper next week when we return to work.
The interface of the game engine is a visual delight and it makes the interactions and programming transparent.
Thanks to the folks at Flowlab for making a totally user friendly yet very robust platform.
I am most impressed with the potential of Flowlab.