I've started to capture my gameplays from Commodore 64 (exactly from Ultimate 64 via HDMI grabber) and one of my gameplays is a first version of Boulder Dash played from A/1 consequently to P/5 for the first time in my life.
My gameplay went a little bit viral in Poland which surprised me a little bit (more than 7K views for now).
I'm planning to make bigger score result in future by the way
By the way. BD II is for me quite easier comparing to BD I especially if we talk about levels of difficulty. Actually only Level 3 in BD II was most hard for me.
Boulder Dash XII (1999) [own reverse engineering of BDI]
Boulder Dash 2000 (2000)
Fantasy Boulder Dash I (2001)
Zulder Dash (2009)
Power Dash (2012)
I haven't yet seen the whole videos, but I'm watching them bit by bit and i really enjoy them! in bd2, level 3 has several specifities with the random seeds. In C/3 you have to make a "horizontal breakthrough" with a firefly explosion, in L/3 there seem to be far more boulders in the way than in any other level, and M/3 I also found more difficult than 4 and 5. In BD1, I found K/3/4/5, I/4 and O/4 most troublesome. I'curious to see whether you also had problems with these caves once I've gotten so far watching your videos!