The game is just SO laggy, that it takes a second to recognize my button presses! Needless to say, this is NOT good for a platformer.
EDIT: I turned VFX off and moved from Firefox to Chrome to see if it runs better. It did, but now there's weird teal rectangle that appears whenever my character lands.
EDIT 2: What do the yellow orbs in the wall boost tutorial do? I accidentally trigger them, but I don't know how I did, because they otherwise wouldn't work for me.