Devlog, update !

Hello everyone, I have made some change in my game, I hope you will like it, do not hesitate to leave a comment to leave your impressions (good or bad) !

Added :

- Day / night cycle,

- Difficulty can be changed in the main menu.

- New highscores for each difficulties.

- Highscores can be seen in a new menu before starting a new game.

- Sprite of lightning has been changed.

- Default speed has been reduced, get gradually faster until it reaches the maxmimum speed.