Fun idea for the theme and had fun! For some reason it didn't let me hit the "battle" on for the 4th so I was not able to progress - but I really enjoyed the concept and first 3 levels!
I'm sorry to hear about that! That's not a bug that we encountered while playtesting (it seems like it doesn't happen most of the time) but hopefully we can fix that in a later version. I'm glad you enjoyed it anyways!