here are a couple tips for beating the rabbit:
realy on your speed; draw circles around him toail won't hit you and he won't go back. hiding the tail but body will hurt you.
also relay on your power shot. beam won't be useful since you have to constantly move
alslo sheild helps alot only
tl;dr
max speed,power shot and shield and draw circles arond him
there are four endings (I could find)
1-(best ending) go to the GF's house without killing anybody
2-kill a crab.
choose 1 in judge
when you are out apoligize in front of the crab statue
3-(bad ending) kill a crab
(after that there are two ways)
if you chose one. crush the statue or pass it completely
if you chose two just ignore the statue
4-(worst ending)
kill a crab
chose two at judge
crush the statue
this is what eveyone whanted: see a world created while playing doodle god and you messed it up with adding energy system. look it would work in a phone game but atleast pc version wouldn't work