Fantastic puzzle game, which I suspect will especially appeal to coder type people, since it's very algorithmic. Oh, and if you expanded the playfield, it would be Turing complete (I think).

Fun fact: Although you grow many plants in this game, you do not grow the coca plant and make crack cocaine. This is because there's no need, because the game is addictive enough anyway.

This is the sort of game that makes you go "oh shit oh shit oh shit" as a third and then fourth crisis pop up in quick succession as you're desperately failing to deal with the two crises you already had ongoing. It frantic, fun, and surprisingly deep.