This uses the arrow keys. This is a major flaw for webpage games, because he page moves up and down. I dont know how to interact with the gray block, as there was nothing informing me on how things work. Bubble snaps to the left when I jump, which also seems to mess with the hitboxes somehow. And bubble clips into the hill, but not the floor above it.
What I DO like, however is the lofty gravity, and the walk cycle. I feel like using BFDI characters for a platformer can open up a lot of creative opportunities, like switching between characters for different abilities (Teardrop would be OP, as usual).