Hi, thanks for trying out the game and giving feedback.
What platform were you playing (Linux, Mac, PC)? Did you have any device live controller, digital pen,...plugged in at the time?
Let's see if I can improve that one.
It's my bad that you felt confused. But to make it more clear, may I ask: did you get that scrolling wheel is to change which skill you can use any where just by clicking on the screen? Did you know that you can also use skills by pressing QWER/ASDF/ZXCV on your keyboard?
Unlike demo, you get to keep the prologue forever (since it technically is a complete product). While dev can disable the demo so you won't have access anymore, even if the dev disable the prologue from sale, players who acquired it will still can play, and download it whenever they want. Steam treats all purchases, free or not, with the same level of seriousness. Fun fact: I had to rewrite the description for the prologue because Steam wanted to make sure "players know what they'll get with their purchase".