Around 58 minutes to beat on Normal Mode. The last few stages were sloppy since my hands started numbing out, could only partially feel the D-pad, but still had enough lives left over to easily win. Weight lifting can flare that up. I might switch over to a stick next time. Will probably try Hard Mode next.
I completed Devil Blade Prototype a few years ago with No Deaths, but forgot about it. That was a very short playthrough on the channel, shown here:
The best way to use bombs in this game is when your sheild is depleted, since it restores the sheild. Didnt read the digital manual so theres probably mechanics Im missing. Not sure what the Berzserk mode is.