First demo build

First playable demo build. Includes three levels, demonstrating the teleportation mechanics.

Features

• Shoot projectiles from a turret to destroy pegs.
• Bonus multiplier for hitting multiple pegs in a single shot, which doubles with each successive hit.
• Projectiles teleport to the other side of the map upon crossing a boundary.
• Beam of light shows projected trajectory of next shot, including a preview of any teleportation effects.
• Adjustable settings, including custom key bindings.