Len's sprite is now in negative and there is a really cool particle effect (that doesnt kill you on it)
The background color change to black such as the platforms which is fucking cool, and the player can now shoot infinite amount of bullet at the same time (useless but kinda fun)
There is changes in every attacks, adding curving, speed but the amount of projectile does not change at all.
Except for 2 attacks. The first and second PIPIPI attack change and becomes WAY harder than before but still fun. The red/pink cherry part becomes more annoying because it had a new pink circle on it which is pretty bullshit. Lot of patterns change too.
The worst thing on the entire boss is that where some attacks were kinda totally luck based on the first one, they still luck based but with more speed/additionnal curving. If you tough the first Opinkosu was luck based, this on is more.
But i should recommend it (i guess ?) because it can be funny to play it for entertainement. But if you want beat this one too, I hope you are ready for a really long and luck based grinding.
PS : If you want to get the download link ask YOU on its twitter. You have to beat the first one before and submit a video of it to proof your victory.