Artist: Ari Pulkkinen
Title: Angry Birds Theme Song
Background: https://wallpapercave.com/w/wp2168567
You need to provide a primary metadata source. I see you linked a youtube video but this is not an offical upload so cannot be used as a source.
https://www.youtube.com/watch?v=Y10PRnL7C_U
Artist: "Ari Pulkkinen"
Title: "Angry Birds Theme"
Source: "Angry Birds Classic"
your diff progression from Normal to Hard is too inadequate.
Just from looking at the start of the diffs, Normal uses 1/1 and 1/2 rhythms, but Hard uses dense 1/2 with occasional bursts. While other sections don't show good diff progression, the kiai is definitely one of the major ones. On Normal, you mainly use 1.2 rhythms with 1/2 or 1/1 gaps; but on Hard, it is very dense with 1/4 rhythms without many breaks (pretty sure it's unrankable for a hard diff).
try to buff up the normal diff since it's very low sr wise and difficulty wise to be considered a normal so that you can utilize better diff progression to the hard. I also recommend nerfing some rhythms in the hard since there are times (especially in the kiai) when patterns have a long chain of rhythms without a break.
they definitely do. you have a long string of just hitfinishes in the kiai where there is none in the music, you're missing finishes where they're really loud in in the music like here 01:04:345, a lot of objects have claps where there are none like here 01:04:095 (1,2) and 01:06:220 (6) here... etc etc, please fix them