Thank you for playing Souls Tree and leaving us your feedback :)
We are aware of the balancing issues the game currently has and we'll continue working on it on future releases.
Regarding the fixed resolution, we previously thought that forcing it would help us keep the game pixel perfect and the UI consistent.
Now we know that this does not work well on monitors that don't have a 16:10 ratio (specially wide screens). We'll work on it in the future.