Main Story, Voice-Over and Slow Motion

When you start a new game, you will see some words and images telling the story.

Finally, I added the voice-over. Encouraging you and me.

• Main Story for starting a new game
• Quote voice-over when you reach some checkpoints or after falling
• You can use the left click to apply slow motion now (0.25x speed)
• The auto-save system now saves everything needed
• Brightness adjustment is fixed

The demo is nearly done.

The following update will be: language translation, more voice quotes, optimization