So in the Big Bang framework you can specify a tick rate:
(on-tick tick-handler tick-rate)
This tick-rate value is evaluated only once I believe (there is a similar question on here where this is stated as so).
If that's the case, how would one go about writing a game (such as Tetris) where you want the shape to drop down at a quicker rate as time goes by? I've got the shape-drop occurring on the tick-handler at present. If the tick-rate changed, the drop would occur more frequently. As it is, I can't figure out how to make this happen without that feature. Any clues?