Nice presentation! I also love the cute enemies, haha... the turtle-riding snakes especially.
My main concern was the same as Soothsayer's, there was no feedback to let me know how "replenishing" ink worked, so I felt like I was never given enough ink to do well.
I think I understand your reply to that comment, explaining that restarting the game is what gives you more and more ink- but making this explicit through text or a post-session screen explaining how much more ink you'll have if you just play again would help keep players from becoming frustrated and quitting entirely.
Keep up the good work!

Neat concept, I liked the art. With the randomized enemies, I think it would really benefit from having a way to replenish the ink. In one run, I got 4 blue enemies in a row but was only given 3 blue brush strokes. It feels bad to lose when it's not your fault. Overall, pretty cool!