Thank you so much for the detailed review! I 100% agree with the assessment of the battle system & softlock issues - these are some things I anticipate fixing in the post-jam update. One thing I will be sure to remember in the future is to cut content when it looks like it won't be possible to finish and polish in a timely manner.
The bust art & title screen image were done by my dev partner HoneyNutFemios, the on-map duck sprites and enemy battler images were made by me, and the other map sprites were made by Hto - so yes, lots of custom art here. Glad you appreciated it!
Thanks again for the critical review.