Autosave + second room updates

The day is today, and today is the day to save!

I have finally implemented the system to save your progress in the game - it's not ideal, it might be buggy, but it seems to be working just fine.

The main challenge with the game is the structure of the story - it's combined of chapters, and each chapter can have multiple subchapters, and within each chapter and subchapter you can have moments in the game where you can select one of many different glitched/hidden objects to get to the next part.

On the other hand each chapter consists of frames, and the frames only define the parts that are changing on the screen - so if you are already in e.g. first room of the game, the subsequent frames of that chapter do not redefine it - they only specify what is changing in the pre-existing room that you must have loaded in the game if you visited previous frame, right?

This poses surprisingly a lot of extra effort to ensure that you come back to the same spot in the game you left, and it won't always go back to that same spot. Sometimes it will rewind the conversation a bit, so that you have context on what is happening.

I have yet to add the auto-save animation to let you know when the game saves, but rest assured that it's essentially after any major moment in game like solving a puzzle. As of right now the game DOES NOT save your half-solved puzzles, please keep that in mind!

I have also included some other minor tweaks, and the shader for second room that now animates!

I have also updated the game icon, but it's a work in progress!