Fun game! I love all the destructibility and how the car can start to smoke before blowing up entirely. It adds a nice level of polish to everything!
If you wanted to keep building, sound effects would go a long way in making the game more engaging. You could go with a normal sound track then the moment things start to go out of control, witch to an over the top sound track. Having police cars come in when things get out of control would add to the chaos too and make it all even more funny. Lastly, some kind of ranking system based either off of destruction or how close you made it would be fun!
Overall fun game! Best of luck with your future game dev!