The game as @Biraj said is easy, the black hole doesn't do anything,

the jumping is basically some extra code, i like the look and feel of the game, but without sound it doesn't feel right, this game needs more time to it, you might add some other mechanics like jumping over obstacles, or more things that chase after you, that can actually harm you, maybe some horror music and sfx, maybe a goal to reach for you to escape, this can be implemented if different ways.

anyway great job, and i wish you all luck!

pretty easy game after escaping there nothing left to do you cant even jump i think because its just a animation right