To answer both questions:
Nope! There's nothing more to the game than just running. If it was a longer project, I might've included something, but I mostly just wanted to capture the feeling of fear and simply fleeing. That said, now that I'm thinking about it, I feel like with more time I might've added more features that ultimately would've diluted the experience? So maybe it's good I didn't have more time ahaha.
Anyways, I did both models myself! Really not modeling characters, rigging, and I think this was my first time doing "proper" 3D animations, so I'm glad you liked them! Personally wasn't super fond of the final model for Grendel, and was considering it as something to do over after the jam at some point if I wanted to polish things up.
Anyways, thanks for the feedback! Glad you liked it!