Thanks for playing! I should have added a tutorial for this, but here it is:
Other levels needed more time, so I ended up using only the boss fight level but forgot to remove those buttons(I will remove them in the next update or include other levels too).
My original idea was to try to get a painting-like art style using hand-painting in substance painter and implementing kuwahara filter using compute shader, which I think I have achieved, but could be improved. Since you only used shoot key, I would like you to try to use other magic abilities, as they are really fun to use