Thanks a lot for the thorough critique!
One problem with increasing the font height is because it's grid based that the bottom row would collide with the top pixels of the next line :/
The overworld speed is indeed slow, I will increase it!
Yup, the room border thing haha. I don't have any idea how to do it tho, because visual indicators would seem unnatural. Any ideas?
When did the game crash exactly? After you hit a monster or what?
EDIT: I just fixed the movement speed on the world map. 2x was too fast, so now it's about 1.5x. Seems better to me. I also fixed the room tile borders not aligning. Now you can always tell! :) It will all be in the next update on Saturday probably