Thanks for the feedback! The big, non-resizable window is a limitation of itch.io that I don't know how to fix. You can play in fullscreen, but I understand that it's not optimal. You can also zoom out the page, the game will adapt to this. The game looks better when you can see more, in the future, I will include desktop builds, so you will be able to choose your resolution.
Walking speed can be improved by wearing gear, so the base speed is pretty slow.