Enemies

Systems
- Modify enemy data script to include fields for:
  - Movement speed
  - Hidden? (bool)
  - Immune to magic? (bool)
  - Immune to physical? (bool)
  - Current "level" (representation of enemy "strength"; i.e. 3 for green balloon, 2 for blue balloon, 1 for red balloon, etc.)
- Basic implementation of base enemy, base + 1 enemy, base + 2 enemy
Balance
- Base enemy should be set to 1 health (dies in 1 hit)
- Modify currency so that it is provided on "pop", rather than on "death" (1 coin per pop)
Art
- Base enemy draft artwork
- Base enemy death animation
- Enemy strength evolution draft artwork
Audio
- First draft of "popping" SFX
Design
- In-depth first draft design documentation of enemy levels (red->blue->green->…->MOABS, etc.)

Towers

Systems
- Modify base tower to include fields for:
  - Shooting speed
  - Shooting pierce
  - Shooting range
  - Shot persistence
  - Toggle for physical vs magic damage
  - Toggle for whether it can detect hidden enemies
- Basic implementation of single shooter + area of effect shooter
Balance
- Cannot overlap towers (each tower takes a bit of space)
Art
- Single shooter draft artwork
- Single shooter draft animation
- Area of effect shooter draft artwork
- Area of effect shooter draft animation
Quality of Life
- Ability to drag and drop towers from UI to map
- Can view tower range while dragging and dropping
Design
- In-depth first draft design documentation of upgrade path(s) for single shooter and area of effect shooter

Systems
- Pause/settings menu
- Save system (stretch goal)
Design & Art
- Draft design of user interface (can be close to a 1:1 of Bloons interface)
Audio
- Draft background music for main menu
- Draft SFX for button clicking