One complaint [slight spoilers]: One of the clues is found by talking to the cat-lady BUT if you ask the wrong questions you won't get it, and you can't get it afterwards. Whole game (as far as I know) is unfinishable without it.
All I'd have to say for improving the game is that the same 3-4 "wrong answers" appear in the Difficult Game (Belize, Algeria, Afghanistan to name three) so when you're stuck on a question the options kinda give it away :P
I've never seen the CPU finish with anything lower than 9000 - I just played a 10-round game where the CPU threw three Zilches in its first goes, and then gained 11240 points in seven throws...
Got to the Moon before I even got a chance to use the new power-ups ( 3-4 launcher upgrades + radar + LOTS of platform bouncing got me there). Hope this isn't just a fluke as I loved the original.
Some people have said that Reckless mode only ever scores high-figure amounts - while it's true that the AI is probably supposed to only bank on high figures (hence its name) that doesn't explain how it almost always DOES get those high-figures instead of Zilching with five dice like the player often does...
Controls do seem to jam at certain points - that or it's a momentum/inertia modelling and it's not working properly. Volleyball's AI is unbeatable but the game's so easy you can't really lose - basketball's too easy apart from the who-can-jump-the-most-times factor with the AI.