that is what I currently do, bird flying and running back to home. but for boss fights this sucks.
like I enter the boss room for the first time, fight a bit die.
then i can retry, respaning in front of the boss room. but as mentioned with only a sliver of help.
so i now gotta go ALL the way back home to the save point get healed and run back for the next try on the boss?
in my case I rather jsut got gud enough to do a zero damage boss fight then.
but from what I saw when I walked through the eggplant boss rooms entrance again (I would BET that I didnt see this when I entered for the actual boss fuight way then but not sure) you apparently can heal using the shift key thingwhich I didnt know so I never did heal while on travle. which made the "back to the only save point at the games start" thing pretty annoying.
but I'll chekc stuff out, know that I know more about the controls :-)