When time ends your food will decay. Just to clarify have you left the first level (and entered the shop level)? If not, I probably didn't give enought information.
You need food for living that's why you are trying to kill these rats. However if you kill enought rats (at least ~15 food), you will encounter wolves and bears which are a lot uglier and dangerous.
I originally did some music implementation, but unfortunately I had problems with porting it to windows, so I had to remove it.
Nice work and fun to play!:) Works fine on windows. On my first playthrough I couldn't find an exit, but that's just me being blind. Overall, awesome game!
The game would be improved with music and if I get some information about why I'm trying to kill all those cute rats!
Nothing happened when time ended?