Very cool puzzle game! With a sizable number of levels too. I appreciated that the menu screen and the win screen both let you play with the physics a little bit. Makes the menus more interesting :). I would also have appreciated explanations of the new elements because for a bit I couldn't tell if a higher number meant more or less slippery for the ice. Also it seemed not to have much of an effect in the first one maybe two levels which confused me more (I think it had to do with that issue with inconsistent physics you mentioned in the discord).
Overall, really good job! If you're thinking about messing with it more in the future, it'd be super cool to have a level editor/sharing :P