Once i found out how the jumping mechanic works, it was fun. I have to say that i almost gave up before i found out how to jump higher tho. Just for feedback purpose, I think if that's one of the game's main mechanic, it doesn't hurt to just let the player know (i/o letting them find out).
all in all, it was a fun game to play. I loved the surprise room with lots of evil spirits.
great job, keep up the good work!
(p.s thanks to your page i realized that you can have both WebGL build and downloadable executable file at the same time!)