I suggest there should be a "Ice Only" and "Iceless". Ice only would be where you can only touch ice, if you touch something other than ice then it wont be a valid speedrun (excluding the non-ice you spawn on) Iceless would be the exact opposite of Ice Only. In Iceless you would have to avoid the ice at all costs. If you touch ice, Then it wont be a valid speedrun.

If this was the wrong place to suggest this, Then inform me, And I'm sorry. If these speedrun types would be impossible, Inform me, And I'm sorry.