Great video man, thanks for sharing. You definitely hit some things I didn’t know about. I should have checked the player’s guide and seen some of it (more hidden blocks and power-ups), but I was lazy and never got around to it.
I don’t understand the superball trick. As seen on the second bug at 1:16, you can run into enemies for full points. (I don’t think you fired a shot, maybe you did, but I get 400 for those guys just by running into them.)
Here are some things I caught that I didn’t see you do~
In 1-2, at 2:05, you can chain the flies and get extra 200 points for the second one. At 2:12, you can jump from the 1st lift straight to the 3rd to save a few seconds. At 2:19, if you hit a block while the heart is on top of it, extra 100 points. You can get this either up top or below.
1-3: 4:24: I find it quicker to break all the bottom bricks first, then hit the top ones.
2-1: 5:46: I think it’s faster to grab those two coins by jumping on top of the pipe just before leaving the room.