The only level I completed without cheating was level 1 of original levels!!
For all other levels, I had some looks on the walkthrough as this game is damn hard.
The Payoff is damn hard!
@girv: my middleware that I have developped all over the years. There's a version in my unfinished Magic Pockets remake, and source code will be included in the Cadaver remake too (as always, as I have nothing to sell and nothing to hide)