Nightclimb WebGL v1.1

Nightclimb WebGL v1.1 (minor update)

(I'm too lazy to update the file version for now. I might do it later)

- Added PlayerPrefs.Save() to hopefully make webGL saving more reliable
- The S key can now be used to slide down walls (not required, but it's useful in some places)
- Some bounce platforms in "Acrobat" and "Trajectories" are now no longer overshootable
- Box Pushing had a gap made shorter
- Key Presses fixed (this was a common complaint. It wasn't impossible, but it was very confusing so I have fixed that part)
- Level Easy made slightly less punishing
- Bug fixed where set 4 pentagon would light up at 8 levels completed