Thanks for the feedback! One of the NPCs gives you a hint that the lake can be frozen by shooting snow at it, but it probably needs to be more obvious (e.g., just putting a sign right next to the lake). Also, the character was kept pretty slow to give the platforming in the forest and lake some challenge (which is very tough to change after the fact). If I had time to do a couple more iterations on the world, I'd try to balance the platforming around a faster character.