Very clever little game!
I really thought I got stuck having to double jump over the lava with the low ceiling where you get the Cloak. Once I finally made it, I couldn't jump back and died in the lava but I guess you keep the Cloak anyway.
If you ever expand the concept have the Cloak+Wind do something like let you walk against windy areas perhaps? It would have been satisfying if the goblins had a death animation, lol. Also, is Summon Water used anywhere?
Great job! :)