You should buy this e-book:
to get you started on how to use cocoon.io to build your construct2 games. In addition, it also teaches you how to create games in construct2. After reading some pages, I realize that cocoon.io does not support Buttons, you need to use sprites to make buttons.
At time of writing the book costs only USD2.59 and it is the least we can do to support cocoon.io and Andreas.