Do not fret, there is a way!

In the Frog customization screen, click the button on the bottom right that says "To Level Select." It's easy to miss. Then, click on the level you want to play. If you pause mid-game (using ESC), you can look at and customize the button mapping for each control in the "Button Mappings" section. WASD for movement, Arrow keys for various types of tricks.

Bless, thank you

How did you get onto the board? In the tutorial, I figured out that Enter maps to the "A" button to start the conversation with the instructor, but after he says "Push RB and LB to get onto your board" I couldn't find any keyboard equivalents (including the key pairs I had assigned to left/right spin, left/right drop, flip tricks/spin tricks, etc.)

The total lack of keyboard prompts plus the never-ending stream of "Collider not implemented: QPIPEMID" error messages and camera bugs make me question whether this demo was ready for prime time. I saw it in the PA showcase list, but I'm traveling with a laptop and no controller, and probably not going to bother coming back to this later.

@naviguesser "E" should take care of getting on the board. Have fun traveling ;)

Despite the input section making clear what buttons to press for what I still struggled understanding what was going on and how to trigger things aside the most basic ones. I didn't get far and am a little confused on whether the buttons worked properly or if I failed some sort of other condition for them to do so