[XCSme]

Can't go over 19, seems to be a lot of RNG, sometimes pieces spawn around protecting each-other and you stuck between them, so not much you can do.

[kalx]

Impossible?

[XCSme]

It is possible, just saying that I can't do it, and there's no logic behind it.

You just have to be lucky and stumble upon a sequence that allows you to surive.

The RNG is seeeded though, always same seed, so you can determinarically explore all moves and find some sequences that lead to higher scores.