Stand next to a wall. Jump and push into the wall, and press the jump button again just before you hit the ground. Even though you're not moving horizontally, pushing the wall counts as running, so you jump up 5 tiles instead of 4 tiles.
Walk off a ledge with wall-jump snow under you, but don't go too far from the wall. After falling for a moment, you can jump straight up (not diagonally away from the wall), and get back on the ledge.
Glitchy_jumps.zip- (736 Bytes) Downloaded 189 times
I don't like these glitches. I designed my other levels with the idea that you need horizontal space to do a running jump.