It looks like I had neglected to select a particular setting when setting up the demo for A meeting of dreams, which meant although the free demo app appeared, people were not actually able to at least easily download the actual demo, as selecting it just took you to the main page without a download demo button. This was not intentional, I have ticked the particular option and you now should be able to download the demo!
Thanks to Paul and others who helped me find this issue.