Hello! This is my first bug report so I apologize if I do not abide by any standards or protocols. From my limited knowledge on this particular game engine and game development in general–I believe this bug to be low-priority, low-cost-to-fix.
As the title suggests, I am unable to Bash a Fireworm on stairs. The aforementioned fireworm is on the decline in relation to my character, it is adjacent (1 tile away) from my character (within Bash-ing range), and my character has at least 1 action point left (Bash costs 1 action point).
I will attach a screenshot for clarity; however, as everyone knows, a lot is happening in this particular screenshot. I tried to minimize the amount of distractions. Hopefully this helped, I love the game!