PC Gamer - Waking Mars is not a game about gardening. True, your primary interaction with the world is to fly around 2D caves gathering seeds, throwing them in patches of fertile land, then watering and feeding them compost. So far, so Titchmarsh with a jetpack.
At some point though, after the slightly-too-long intro phase, you realise that Waking Mars is actually about ecosystems: organic machines running autonomously, and the satisfaction of knowing that it was you who built the engine. 73/100