randomize sandbags in slouch-o?

I really like the falling sandbags in slouch-o and see people get hit or trying not to.
People (who are playing slouch-o for a while) kinda know where they are going to fall, so they are stop walking even before the shadows popup.

I wonder if it would be possible to randomize the drops in the slouch-o levels? They don't need to be all randomized, a fixed base is fine i think. But a couple of sandbags with the possibility to drop or drop somewhere else instead. Or depending on the group size multiple bags? This would increase the difficulty level and the fun.