According to kuja killer, shouldn't you be shooting small objects as well? It seems to me you missed at least 2 at around 0:30 and then many more at 0:35 and 1:05.
Love the run, it just doesn't seem logically complete to me unless I am misunderstanding the RNG incrementing on small objects.
If my speculation is correct that this isn't optimal, now might be a good time to learn hex editing
, as it should be a relatively quick fix.
Redo screen 1, hex screen 1 in.
Redo screen 5, hex screen 5 in. (don't kill the red tsuare stomp any more?)
Waste ~10 frames (if that) before the boss and hex then onward.
If it is an improvement, and it is possible to hex edit it I would suggest doing it. If it is not hexable, then it is probably okay to move on. This game sounds hexable based on your descriptions though. (Be sure to backup your progress, but I'm sure you know this.)