Just updated some changes to the existing code to try and change the behavior of asteroids when they are smashed with your ship at high velocity is in the Cannonball power-up, the Smasher Power-up, and a Spi-roll attack.
Before now, bigger asteroids far too often just looked to immediately be vanquished when using one of the above mentioned power-ups or a Spi-roll attack. I look to start changing that and making it riskier to try and use one of these methods to break an asteroid down.
So in this updated build which is live now, at both higher difficulties and especially at higher levels during your game (higher waves), you'll notice that smashing into a larger asteroid with any of these methods will now both look better and create more danger for you in much faster moving smaller rocks. Remember that the big theme behind my game from the very first build of my game months before it hit early access on Steam was 'Risk VS Reward". You should now start needing to think a little bit before trying to dismantle a large asteroid very quickly. Sure it has high rewards and massive points and quick resource drops, but it now has a price in much more dangerous smaller asteroids flying much faster when you use your ship to break apart a space rock.
This is just more in my long list of patches and updates to make Rock 'N Roll both look and play better. It will very likely need more tweaks but I think it's already better than it was. I'm sure you'll notice a difference especially as you start moving deeper into your waves of asteroids as you progress now.