The UI is great, the visual style is solid and it seems these are where you spent most of your effort so far. Nice touches like the shader for characters behind objects.
Low movement speed with a large map makes the gameplay itself nearly unbearable at the moment.
Diagonal input should not make the character stop moving. Just keep it going in the same direction. Also if that's a limitation for combat it would be nice if it were disabled while you're just moving around but that's really low priority in comparison.
I accidentally fell off the map by walking behind something.