Adding Progress Bar and a 15x15 puzzle (and some fixes)

Hi, this update is light but nice.

Update:

• Progress bar: 

A progress bar appears on the left of the game screen. It quantifies the progress of your puzzle using the (presumed) completed clues.

• New puzzle: 

A new 15x15 puzzle has arrived in section 2-2

• Fix map movement: 

It is no longer possible to spam the move button on the selection screen

Thanks for reading!