Hello there. I agree with >>4212. Most of it is smooth, but you tend to use more lines when it comes to limps, which shows as little splinters here and there. Just cleaning those up will make your drawings a lot better. Otherwise, play around with varying thickness of your lines when doing line art, if you are going for the manga style. Know where your light is coming from and use thicker lines around areas where the shadows would be. This will help pop up your drawings more.

Otherwise, I like the end scenario in you tentacle pic. Keep practicing :-)