Controls
| Left mouse | Place element with brush |
| C | Clear |
| Shift + C | Clear without border |
| P | Toggle pause |
| 1-4 | Select primary brush element |
| Shift + 1-4 | Select secondary brush element (used for placing structures) |
| N | Step simulation while paused |
| S | Place sieve |
| Shift + S | Place wide sieve |
| D | Place diagonals in a V shape |
| Shift + D | Place shallow diagonals in a V shape |
| F | Place floor |
| G | Place grid |
| Shift + G | Place alternating grid |
| B | Place box |
| Shift + B | Place filled box using secondary brush for the border and primary brush for the fill |
| R | Place square using primary brush |