whew. really steep learning curve. too steep for me, made me feel like a dumbass. on my 5th or 6th attempt to get past training 4 i had enough of the abuse!
you must be a smartypants to make puzzles this difficult. give people a more gradual difficulty. ease them gently and slowly into your nerd-like hell and i think even more people will enjoy it.
this is a lot like cubis, visually and in theory.