When you are asked if you want to have an explanation of the challenge mode (day 2, when you meet Hammer), you supposedly can press 'a' to say 'yes', but instead it sort of closes that dialog, and opens it again right away.

...if you buy the soundtrack. In fact I already figured it out but I'll leave this here in case someone else is wondering. Just right-click the game in the library view and choose "Manage - Browse local files". The songs will all the there. Speaking of which, Pseudo, could you put them in a folder so they're a bit neater? Thanks for the game! Writing my review soon....

mimicking some songs with my voice is easy. but this is different than that. AND difficult. I guess I'll have a bad time

Hello, Tobias. Glad to see you're working again. I wonder what wonders you've crafted this time?