Wow I love it so much!! The game is really fun and well polished. There's a lot of content too for just 9 days!
I love the eraser bomb so much, the visuals are so cool, seeing to the next level/page is such a cool idea, I also like how it affects the gameplay by doing a lot of damage but also restricting your own movement, so it's like a double edged sword.
For some criticism, the sounds were somewhat repetitive, maybe more pitch variation? Also maybe if I shoot a ton of slimes at once (within a few ms) I think it should only play 1 hit sound for them. I also sometimes got stuck inside the eraser grenade hole, I'm not sure if this was intended or a bug, but it was somewhat annoying.
It took me a while to find the final boss, I thought he might have not spawned but I eventually got him. I do wish he was a bit harder too!
Really good entry!! I had a ton of fun playing through it :)