Hello! Thank you for playing! I've used Unreal's geometry script plugin, it's still in beta, but it works pretty well. I've faced a few bugs here and there but managed to overcome them.
I plan to write a tutorial about it pretty soon :)
I might add a little hint into the description that might help players go through the whole game. As I replied to plexsoup, there is a little trick (that I left on purpose) that you can press the "retry" button to replay the current order without penality if you decide to do so before you reach 5 seconds :P