Hi, Mofu. I have a few minor things to report.
There's a weird physics issue where the large balls take a very long time to stop swinging back and forth. Actually, they never stop unless you stand perfectly still for several minutes. It's really bad after crouching. I have to unequip them since it's so distracting.
Using the Umbrellashroom while on a ladder causes some...interesting effects. Having a button to let go of a ladder would be nice. While using the Umbrellashroom, being able to descend faster by holding down would be convenient as well.
The small breasts have some odd graphical issues sometimes. They point upwards when they shouldn't, and it makes it look like Nene's ribcage is trying to escape her body. The Umbrellashroom issue should show you what I mean. It's also noticable while crouching, and a little bit while dashing.
Swinging a weapon while crouching will cause you to remain crouching as long as you keep attacking, as if the game tracks Nene's position rather than player input. You can also swing a weapon much faster while crouching, and this causes a graphical glitch with most weapons.
I also feel like the dodge roll and standing attack could use a little polish. It feels a little clumsy on recovery (animation end). But the movement in general is already very good. You did a great job on the grace period to prevent midair jumps when there should be a normal jump. That feels perfect!
I think the Sell menu should display the attributes of equipment, and exclude items that you have locked. The "Confirm" option feels like it needs more contrast when it is highlighted. Pressing up while on this menu doesn't go all the way to the bottom of the list if it's too long. Being able to hold the button on the Inventory menu to move faster would be nice, though switching to the mouse instead works fine.
Speaking of equipment, I feel the Dash Speed+ attribute is...a bit too much. Just having +1 doubles your speed. It is hilarious, though. Gravity can't keep up with it. Woosh~!
There is a farming exploit in the first area: Just spam the first metal post and go crazy with the bow. Limiting the number of enemies that can spawn and how often would fix this. I think you probably plan on removing this post entirely, though.
I hope this isn't overwhelming; they really are small things. Thanks for your work. It's been great seeing the game take shape, and it was a smart decision to port it here. The parallax scrolling looks great, and the dolls are adorable. Mine shoots lightning!