thanks for the feedback!
some things had to be changed/fixed fairly close to the demo launch date and we didn't have time to make them clearer afterwards. we're definitely taking feedback into account for full release though (and will try to do smaller updates in the next couple weeks for the more minor changes)
i'm not sure why the mouse tooltips weren't working for you the first time around though, that's really weird. i'll see if there's a way to have a fallback for if that happens. the shift thing wasn't showing up before you hit shift because keyboard and mouse are considered different control schemes, so the fallback should make that clearer too.