Thanks for playing Between Gods and taking the time to share your feedback!
Congratulations on defeating the first boss! It sounds like you quickly picked up on the rhythm of watching the enemy attack animations rather than just relying on the onscreen prompts.
Parry Timing & Difficulty: The tight parry windows and learning curve are definitely a big part of the game's challenge right now. Adjusting the parry timing window and making the difficulty curve smoother or potentially adding a more forgiving mode is something being actively looked at so players can get into the flow without it feeling brutally punishing right off the bat.
Stats and Inventory UI: As you mentioned, inspecting stats with the mouse is currently buggy. Pressing TAB is the reliable workaround for checking your stats for now.