@predominant Try it and see! :D
If you aren't touching the darkness, you won't accumulate any score at all. If you hold space constantly and try to stay near the darkness, your score gain will be incredibly low. Over time, the rate of wall growth increases, as does the speed of descent, while your ability to push the darkness back and your rate of movement do not. Within a minute or so, the rate of darkness growth will exceed your ability to push it back at all, and staying near the edges becomes incredibly difficult as they fluctuate faster than you can move. Soon enough, you'll be overwhelmed, having earned almost no points for your troubles.
Strictly speaking, the scoring is implemented as such: `count * difficulty * deltaTime * (level + 1)` Count is the number of darkness circles you're touching. Difficulty is the cumulative radius of each circle minus your radius (which deceases over time, thus increasing score gain). Level starts at 0 and increases by 1 every 5 seconds.
Essentially this means that it's essentially impossible to get a respectable score without making it difficult for yourself, and the highest scores can only be gained by a combination of luck and skilful aggressive play. I'd be surprised if anyone even made it into the tens of thousands by playing it super safe before the game crushed them.