@nyanchan,

There is a bug in stage 12 wherein if you go to the stage after you completed it, you do not get to choose whether to include Carla or not.

I'm assuming at least, that this is a bug? If not, I stand corrected.

where can I read all of the changelogs? can't find it in my bk3 folder

There was an update and I see no latest entry of a change log anywhere. Strange?

oh... wasn't there the changelog? Did I forget including it? Let's see.
(Looks at the folder with slight surprise and sigh)
Here's the answer. I did include the files, but old ones. My stupidness!
I already updated the file on server, but for those who finished updating and missed the changelog:
2019/01/28 Version 1.91.4
Fixed: The game no longer shows "Do you want Carla to join the battle?" for stages that you haven't completed (#15).
Fixed: Some translation issues have been addressed (#17, #18)
Fixed: The number row keys used for switching carried weapons no longer works outside of the game window (#19).
Fixed: If the file name of a save data is changed externally, the game automatically fixed it and was overwriting the data immediately, resulting in entirely skipping the compatibility check between last saved version and the current one. The game now postpones the data saving, thus the skipping no longer occurs (#16).
Changed: I decided to give the compact sonar at the tutorial remix. By this change, the item is no longer sold at the shop (#2).
Changed: Additional logics have been added to Carla at stage 12. She now watches fireballs and firestones, and if necessary, she prematurely ends shooting to avoid being burned. Also, she performs jumping attacks when trying to destroy firestones near her (#8).

hello, anyone know how can I get the cat paw thingy? someone says it's in tutorial area 3, but I can't find it. any condition before I can get it?

I actually find myself not mashing much, like on my save I used to write my walkthrough with, I ended with a space mash number of about 15000. So I'd actually have to force myself to press the thing a lot more often, haha.

Oh, meh, if you think this is a space bar masher, try Psycho strike, and AAC.
My family couldn't stand the sound. If they had seen the game window, they'd probably have thought that in Psycho strike, my real enemy was the space bar!

One day, you notice a virus, that calls himself RS, has intruded into your space bar, claiming that he will take over your space bar and make your space bar like a mashed space bar. You decided to run your untested program, turn yourself into a program and get into your space bar to get rid of him. That's where you start. You are equipped with your knife triggered by your space bar, and laser which can also be triggered by your space bar.
Anyway, how the rockets work at the moment is intentional. Basically, she fires rockets when you are sarrounded by enemies. Since you are approximately centered in the swarm, rockets landed near you are expected to deal the most effective damage. Where do you think they should land on? Or are you just pointing out that she's  vulnerable while firing rockets?

I think what 2725 was talking about was those times when you're just leaving Carla to do her own thing across the map, but she's firing rockets at you instead of the swarm that's around herself. Honestly, whenever that happens I just call for rocket support near her myself, I think it's fine as is.

It might be a little bit more difficult to define what to change exactly, but I will try thinking about it. I agree that the stages are long and everyone wants Carla to take care of more enemies.

Hmm, the rockets aren't very useful in the higher difficulties, I don't suppose she can switch to death rockets in the higher difficulties?
It does make it harder though.