And I hoped that this thread would silently fade away, so I could forget about that "game". #%"¤#$ you nelg, you've stolen all my free time.
My favourite is to blend lots of oil with some water (oil:5 with some spout next to it, blend by letting it flow over a wall), and then water a plant with the mix. The plant grows more wildely when the water is blended with something else. And when mixed with oil, there's a fun way to get rid of it when it's finished. Or you could burn off everything but the plant with some "???".
Another fun game is to build infite "???" tracks.
Or the "Phoenix plant": put a spout next to the oil source, let it water a plant, and turn the oil source on fire.