Today was rather an annoying day as with it being the end of the week I thought I would spend some more time levelling up before facing the second castle. I needed 2000 points and got to just over 1500 when I died. I attempted it again and got to just over 1700 points when I managed to die again.
At this point I decided to stop playing for the weekend. It was annoying but didn't stop my interest in playing through the game.