Hello Shadree,
First of all, thank you for your feedback! We hope to receive more reports from you.
Currently, the shop is still in development. Once it is complete, you will be able to buy special attacks there. And yes, the shop respawn issue is a bug—lol!
We are also working on improving the gameplay loop by adding more enemy variety and items that can assist you during battles and exploration. The character artist was very pleased with your compliment!