Interacting with your castle in the middle of a battle has already been discussed. Tbe devs would advise against because that would deviate from an “auto-battler”
Your Castle’s maximum space increases as you level. Make smart decissions (and compromises) when designing your castle to maximise the offensive power as well as defensive.
About the feel of how you do in a battle, you will get that as you play, sometimes a battle may turn around with a single cannon shot hahaha
What you mean about no reward for free chest? you do get free chest points when you level up. just make sure you are not already at 300/300… because that would be a waste, you will not get the awarded free chest points.
At the moment, the usernames are based on a code which is unique for every player. That means, more players can have the exact same name but with differeny unique codes, which makes them different.
You want to make names unique? Hmmmm yea, I may support that. It is nice to feel unique hahaha