If you press enter from the menu it leads directly into the new boss fight. If you beat the boss and proceed to ****, pressing space skips the climax but leaves the 'sounds' playing constantly.
Also my save is missing, probably because the game is storing the save in 'neko_newsystem_4_6' instead of 'neko_newsystem_4_5_newsystem', which I don't mind replaying every now and then, but not every time there's an update.
Other than that, I'm liking the new content. Keep up the good work.