Looks like its made in 2013. Beautiful

Fine animation, and funny idea. I do have a few notes if you want to read this up.

The timing at the start is kinda off-putting, I'd try making the timing of him throwing his hand back a bit more constant.
The transition between the windup for the slap, and the tentacle attack feels too sudden. I'd add a transition frame during the windup, that reveals the tentacle, before it goes into the side view.

hi dick

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).

Toaster toast of toasted toast

weirdly addicting

Splingbrong

worm

Perfect

That first emotion, the stare of just pure nothingness. The cat has seen the outside, and there is nothing

You deserve a LOT more views, this is amazing