Hey, similar experience, didn't know what to do. Moving animation doesn't play if using the arrow keys, world limits and background doesn't match and I couldn't figure out how to eat a human if that's a thing you can do going from other comments (?)
For the next time you could add the objective / controls in the description if you don´t have time to do it in the game. Congrats on being brave to try to make something and I hope you keep learning if you like making games!