Fix needs review.
You can still use Nitro Boosts under the effect of Levitate if you have applied it beforehand: https://gyazo.com/ff93a2e048a330a957fe19e1bbbf99d2
But if you're under the effects of Nitro Boosts, you cannot use Levitate: https://gyazo.com/48428f92350526ddf8b02946a308d55c
An addition, a visual issue with Levitate, after you use the spell, the cloud disappears after few seconds, so it looks like you're hovering in the air: https://gyazo.com/743c656ac442dfa5203a6af87fcab57c