If you don't take any profit from it, you can, but it should be really any profit on the page of the game (no advertisement too)
And you should say something about Scirra and Construct 2 (there is a line in the index.html you can't remove legally, I think it is enough)
And if really you are worried, and don't get any other awnser, send an E-mail to the support.
Hope that helps
Game design is all about decomposing the core of your game so it becomes simple instructions.