Firstly, thank you for remeowstering this great game. Everything looks and feel very nice and polished.
But if there's one thing I could add it would be an option for "classic" mode with timer. I feel the energy system kills the pacing by incentivicing to play slow and meticulously and even stop when you are running out of energy. Even though I usually hate timers on most games, in the original Catlateral damage part of the fun was the frantic search for something to topple to meet the goal before time ran out. I feel the timer made you play in a more fun way: always thinking on your feet, never stopping.
The other thing I'm missing from the original is that playing the levels one-by-one feels a bit awkward. Running through all randomized levels one after another for a combined highscore made a fun and varied experience every time even though actually getting a record score somewhat depended on luck.