I got this game the day before yesterday and it's *the* perfect relax-and-play-half-an-hour game! Congratulations Cavebuggers, I really hope that your work is paying off!
Up until now every aspect of this game has been 100% enjoyable: Music, sound effects, reward system!
One aspect confused me though: Some tips that are displayed only work in "Mystery Balls" mode but are also displayed in "Magic Balls" mode - may be better for new players to divide these.
Keep it up, Cavebuggers, and happy 2008!