If I can do it, everyone can ! ^__^
For me, being "completly stuck in a wall" in not a real bug, but a "power bad used".
The wall trick is a wonderful pause in jumps that allows to go further.
And the respawn key is perfect if the player is definitively stuck, obviously.
(the "R" respawn magic key ! I Love it ! I've used it so much ... my precious ! ^^")
PS : thanks for the comments about the music (*_*)