| Space | Play / pause |
| R | Play backwards / pause |
| 0 Home | Back to 0 s |
| ← → | Step 0.25 s (Shift: 1 s) |
| [ ] | Slower / faster |
| P | Painterly on / off |
| H | Hide / show all controls |
| ? Esc | This list |
One building, two clocks. The lower floors run backwards and fly back together from the rubble while the upper floors blow apart.