I love the classic arcade feel. I think the LittleJS engine is very suited for making retro-styled games. If you were going to add something I would add a way to fight back against the leopards, if only to temporarily stun them. Great game!
I was actually planning on adding a way to fight back as another way to score points, but it didn't make it in time for the jam. I'll probably get to it in an update.
