Charming game <3 The way skating / traversing the lake operates reminds me of those old school ice puzzles in Pokémon - was that the inspiration?
I was testing the friction parameter for different tiles, where the default value was 0, and then I realized that giving the player no control over iced surfaces could be kinda interesting mechanic Σ( ° △ °)
It is a fun mechanic! It is kinda cool you came up with it on your own :) Have fun exploring options with it!