Super fun little game! this is super well done and honestly I could have seen this actually being released in something like super Mario Olympics or something. Few things that would have been a bit nice was to know that you are suppose to look to the left while aiming your puck. I quite didn't understand that at first but something i did made it work.
There's a glitch where if you don't hit your puck, and it stays at your start, the AI puck gets glitched and it starts bouncing back and forth repeatedly till the game crashes. To avoid this you might want to set any pucks that are in the start zone to have zero Collison's. I think what's happening is the second player spawns on top of your puck which causes the Collison bug.
Super fun!