Terribly sorry.

Mac's Gatekeeper software thinks our game is made of evil and won't let you

play it. This is the most likely, and can be fixed by going to System Preferences > Security > General.
Then set "allowed apps" to "all".

If you have issues with the above, absolutely feel free to let us know and we can
discuss it.

HelpMe@TheTallTreesGames.co.uk

Thanks so much, and sorry again.