I played your game, this is what comes to my mind for the feedback.
1- first of all I loved the art style and sound design.
2- the game lacks the story and aim, why is he exploring the caves.
3- the camera following the main character was making me dizzy,
4- the shooting mechanism did not kill the blobs.
5- the blobs disappeared randomly.
6- the game over screen needs work and sound design and animation can help it.
7- there is no main menu and continue option
8- the character falls on a platform but it starts the game from somewhere else.
9- the character I think should start from the level it died not from the start the game.
I think this art style and Idea can make a fun game.
I have started developing my first game to I would appreciate it if you could give me your feedback.