answering because no one else seemed to
1. yea the creator says hes gonna add more but in what increments or amounts per update vary (if any)
2. i usually do because some times new mechanics or characters are added so i would suggest to do so
3. it looks like a monthly update schedule however again it varies as good art like this takes time.
4. (because i want to) i so agree the art style and story so far in this game is very nice and humorous. i love this game aswell