The arrow is the direction the cube is facing (might get rid of it to be super evil)
You move by jumping with WASD, but jumping spins you in the direction of the jump. You only have so many jumps you can make in the air to prevent flying.
dont remove the arrow it will become impossible-
maybe add areas/levels where you can actually fly but make more deadly obstacles in those areas (those spinny circular saws or something like that)