Thanks for the clarification. One of the issues I run into is being too wordy with instructions, and then nobody reads them because it is too much text. This time maybe it was too short? Maybe next time I'll have to do a graphical animated illustration, but that takes a lot more time than I can afford during a jam sometimes.
In this particular case, the flick upwards means to move the tip of the left pointer upwards in a swift motion to make the deer jump when you are controlling it, as if it is a puppet you are dangling on a string.