i was thinking of something like least jumps or least wall turns.

Least jumps sounds fun, but since wall turns are slow, any% is alredy Least wall turns%

Btw, you are playing on the kongregate version not the coolmath one. The fastest way to check which version you are playing is to check the light in every level transition. If the next level number like "Level 26" appears for a second on the light, you are playing the CoolMath Version, otherwise you are playing the Kongregate version.