Will say, pretty interesting concept, but there aren't enough proper directions for people to figure out everything unless they snoop around a lot and mess with the main menu.
other than winning and losing not mattering as you end up on the same screen with just the score after feeding her be different depending on how you did.
Ramming the other ship with the boost though seems to be the best and fastest method to get to the feeding as soon as possible. Though with max size being 10 burgers, ramming it at least 12 times and/or collecting enough objectives by also just setting the timer to 10 minutes on the main menu makes this a whole lot easier.
Also, giving her the 2nd last burger takes you to the end screen.
SPOILER for max size below:
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