Thanks for playing our game. We ran out of time to implement the save/load (more specifically the load part). We also didn't get chance to add a New Game option, so yes, you do have to restart the game if you fall into a pit. Sorry about this.
You weren't doing anything wrong with the jars. That was another bug to do with physics and them being dynamic instead of kinematic, causing them to wander around on their own!
The combat was where we were really trying to innovate and bring something new to the table. Unfortunately it was more ambitious than we realized and so we ran out of time to finish it, and as a result didn't test everything either. Hopefully our post jam update will show the combat in a better light.
Thanks again. We look forward to playing your game soon.