Level Design

1. Player's Inventions

1.1. Start Simple

1.1.1. Attack? -> Sword

1.1.2. Defence? -> Bandage

1.1.3. Kill Boredom

1.1.3.1. Critical Chance (eg. Goggle)

1.1.3.2. Projectiles (eg. Arrows)

1.2. Cool Mechanics

1.2.1. High cost, high damage

1.2.1.1. Guillotine

1.2.2. Enhance Defence

1.2.2.1. Shield that blocks damage 3 times

1.2.3. Creating units

1.2.3.1. Machines

2. Enemy AIs

2.1. Basic Behavior

2.1.1. Appear mostly at early stages of the game

2.1.1.1. "Forest 1-5"

2.2. Complex Behavior

2.2.1. Boss

2.2.1.1. "Deep Forest"

2.2.1.2. "Challenge Mode"

3. Levels (Dungeons)

3.1. Enemy Pool

3.1.1. Numbers

3.2. Storyline & Narration

3.2.1. Tense Curve