I love the hand drawn paper sketch aesthetic. The graphics and gameplay reminds me a lot of Kirby Canvas Course except with a much darker setting. I discovered it's a lot more fun to play with a drawing tablet. I couldn't reach the boss on time because of it's cruel yet fair difficulty. My suggestion would be to leave a checkpoint at the start of each level that way many other players won't rage quit.
Overall, I love the art style, and the dark and innovative setup. Definitely worth playing again. Good Job! :)