Yup! It'll be free.
If you mean the web version though, I won't be releasing a web build since as of current, the web build couldn't even contain the full demo... so I'll be cutting out the web version. I'll still release the PC (Windows, Mac, Linux) and Android versions.
As for the walkthrough- I'll probably release one at a later time after the full release? Depends. Honestly, I don't want to make the game too difficult so I'm not sure if a walkthrough would even be needed.