So, I was thinking about Ice Man's (X-Men) ice slide and then eventually I started watching some videos of Kirby and the Rainbow Curse.
Then I started tinkering around and got to this:
I suppose that'll be the main mechanic,creating a trail of ice, now I just have to come up with the rest of the game!
As far as diversifiers go I'm looking at Focused Palette and maybe Talk is Cheap.