Thank you for sticking to the end, wow that was a close call!
The improved version addresses a little bit about strategy: in short, you should dance around a bit to avoid being hit, instead of just bashing the enemies and receiving hits (but it's hard to communicate that!)
There's also a single way to recover health, but you shouldn't really rely on it (rather try to avoid damage on each run and hope a little bit of luck is in your side :))