Fighting goblins is much easier once you have decent agility and strength, agility impacts how fast you can swing and build combos, strength increases knockback and increases damage. I'm guessing you still have old config files in the 'roaming' folder, 'C' should be the default jumping key now.
Audio settings are just for show for now, but you should still be able to return to previous menu by pressing 'X' or 'escape'.
I have a dirty little secret and that's why 'space' breaks the intro. I'll have to fix it up soon.
Thanks for Dirking around this DemoDay too! I have to say that I didn't make enough progress since last DD to feel accomplished but at least I can fix some new bugs.