Ghost talk update

Hi, I finally have a first release for what was the flappy typer prototype o/

This release includes a story for the game that was made for the Trans Game Dev Birthday Jam.

This updates also includes a lot of tweaks and some major updates like :

• a progressive difficulty curve,
• the next letter to type on the side of the cube,
• coloured text.

Don’t hesitate to give me feedback on the story and the game over all ! And don’t forget to have fun <3