I heard you wanted feedback so I'll try to makes notes of everything I saw.
1. Z-index seems to get a little messed up, things in front of trees would appear behind it, things behind it appeared in front.
2. Font is a little hard to read on buttons. Need more contrast between the text and its background.
3. Art is very nice, music is charming :) Some images appeared pretty blurry, might be a scaling issue.
4. Game probably needed a tutorial.. What does the % mean when I cast my spells? Did I not draw it properly? What do my spells do? Are there any special effects? What makes the characters different besides the different spells? I think its important to consider the perspective of the player and guiding them as if they were a 5yo, cause I play like one. I found it really hard to actually play because I didn't know what to do or what my spells were doing :(
5. Map borders can probably be thicker, more rocks more trees make it look a little more like a wall.
Hope this feedback helps!