-| Regex of id | Description |
-|--------------|-------------------------------------------------------------------------------------------------------------------|
-| `player` | Defines the **position** of the Player. **Size is ignored**. |
-| `rect.*` | Defines the **size** and **position** of an impenetrable platform block |
-| `box.*` | Defines the **size** and **position** of a rigid box that obeys the physics of the game |
-| `region(.*)` | Defines the **size** and **position** of a region that hides the Goals. `\1` defines the id of the Goal to hide. |
-| `goal(.*)` | Defines the **position** of the goal. **Size is ignored**. `\1` defines the id of the region that hides the goal. |
-| `lava.*` | Defines the **position** and **size** of a lava block. |
-| `background` | Defines the **color** of the background. **Position and size are ignored**. |
-| `backrect.*` | Defines the **size** and **position** of a solid block in the background. |