Post-jam patch

Hey everyone ! 

This is a small patch to fix some of the bugs in the jam build. Here's the full changelog : 

- Fixed restarting in the pause menu spawning you in the wrong level

- Fixed cutscenes not playing

- Added cub functionality

- Added cub models

- Added a third cub to the last level

- Added a win screen to share your final times

- Replaced the backpack button with a credits button

Thanks for playing :)

-b