Demo 0.2.7 and WIP

The demo has some minor updates.

• Updated tutorial to better explain the mechanics and make sure you try them.
• Adjusted enemy swordsmen behavior to give you warning and then hit-and-run.
• Some enemies vary their speed for more interesting movement.
• Score for damage done to enemies increased from 1 points/HP to 10.
• Warning flash when enemies are about to fire.

The majority of recent work has been on later stages which are reserved for the full game. I am considering early access to these stages for a small donation when they are playable.