I played some yesterday. It is pretty decent (I've made my way to Marle), battles are not too hard nor too easy.
There are something you might want to change:
1. Sound effects are too loud while music volume is a bit low.
2. Tanya moves too fast IMO, like she's in a panic in her room.
3. When you enter Sealos castle, the 2 guards keeps saying something and moving to the left and right side, as long as you wander in that room. Maybe you should let the event entity disappear.
4. I recall a NPC in the town to the south of Sealos castle has a strange border when he/she face a direction, I guess the picture is not in correct size.