Small QoL changes to mostly the backstage level to make it more intuitive.

• Players can now only type new prop names to pick them up, without typing "pick up" before it.
• Added "pick up" before new prop names in the revealed floating texts. For example, "pick up explosion" instead of just "explosion".
• Improved dialogue in backstage levels for better clarity.
• Added missing blinking damaged animation to slime and dragon.