Thanks for making me feel less alone.
Nice work, too. That 3-2 boss is a bit of a monster at first.
Yeah, I haven't found anything for scoring aside from the bonus items hidden around the backgrounds, and the coins some enemies drop: Medals for 5000, dollar signs for 1000, coins for 100, and a power up when your weapons are fully powered is worth 3000 points. Also the bomb bonus at the end of the stage. I haven't been able to really figure out if their worth 5,000 each at the end of the stage, or 5,000...10,000...15,000...20,000...25,000....
I'm also curious about the Clear Bonus: I've only played the second routes so far, and the clear bonuses for those start at 20,000 and increase by 20,000 each stage, but that got me wondering if the clear bonuses are any different for the first path.
By the way, when you get to stage 4, if you take the second route, there'll be a bunch of little zako enemies dropping coins like crazy. In that mess of coins, I've gotten two 1ups to appear, and always at the same spots: in the first line of them, and then again when they come from three or four different directions, one pops down from the top, down the middle of the screen.