Final release for the Mirror Game Jam

Ok, due to time constraints, this will be the absolutely final version for the jam, though I still plan to continue work on this later.

Change list

• The size of tutorial messages has been improved
• A victory screen, has been added
• The player is now able to drop through platforms by moving down
• The sky is not just a solid background colour anymore
• The lighting effects have been update to be more consistent with the pixel art style