TowerClimb is grossly underrated...never quite got the attention it deserved.
As for the 7 fragments run (which I'm also yet to finish): brutal boiler isn't too bad; after a lot of practice winchshot becomes second nature (albeit infuriating if you don't reorder the levels to practice ;)). The arcade was the hardest for me (damn stun./zap blocks are hard to predict/outrun).
Anyway....giving Aura a spin; if it's good I might leave you a tip :)
EDIT: Neat game;
Reminds me alot of TowerClimb, Catacomb Kids or Spelunky with the depth of interactions (though a fair bit more forgiving and quite different). TC is still my favorite; but I look forward to seeing how Aura develops :)