Dude, I've played DD and SDD in less than a day, having played both I find the old one strangely more satisfying, is not that I don't like the new one. In fact I love it. But the old one is more frustrating, and yet that's something that makes it more satisfying (At least for me, an old school gamer). Completing the last trial in the old one, no checkpoints, was really the best.
This one has far less bugs/glitches and is a lot more polished (Something that makes it easier, at least for me). It's shown how you have improved over the years! Keep up the good work.
Also I'm taking my first steps doing videogames, what software/software did you use to make this game?