Thank you for your kind words and detailed criticism! Yes all the art is hand painted with watercolors (made by brother, we worked on this as a team of two). I'm very glad you liked it! We actually had many more assets (a few more bosses, cards, backgrounds), but were not able to implement them meaningfully into the gameplay. Same goes for the UI, and sound effects (we actually made some original SFX, but again, due to a lack of time we decided to focus on other things to deliver something within the timeline).
I had never heard of the game Paradigm. But it looks very interesting. Will definitely try it. Thanks for the link.