OMG this sux- i was winning like 10000 points to like 4000, OK, it took 7 turns (lucky) and it was zilch-free. THEN, he somehow gets more than 6000 frekin' points in the next turn, and beats me! WTF!?!?!?!
Did NE1 know it is possible to get lvl 18 without hitting any crates? I kinda did it- on one try I got the first two rows, and on a second i got the third without hitting any crates.
Tip on bosses- focus on dodging the bullets, and not on hitting him. Although the bosses are hard, they're huge, and a big portion of the screen you can be on will hit them.