If you Cancel mission, you don’t lose anything, nor get. That only works for first wave. If you surrender on further waves, you’ll lose everything you spent, including lives. Your amount of lives at start will be the same if you have some lives left, they automatically applied to previous attempt slots like everything else.
Firstly, there is no balloon chicken in the game (yet?)
Secondly, why would balloon chicken appear if it has no balloons in UCO?
If by UCO you mean boss and not regular enemy, I have another question — why?
Yes, you can “surrender” a mission after completing it (while “mission complete” is shown), and it still counts as a victory. Would you rather have it count as a failure?
I know it was suggested before to add health bars to bosses at Double Team and you said:
So how about adding health bars to some bosses that appear at Double Team? I know they’ll still have health bars even when they aren’t at Double Team mode, but it’ll really help at waves like wave 50 at Ironman and when fighting the boss normally too. It ain’t necessary to add health bars at bosses who gave signs when damaged like Iron Chef or Space Crab, but it is for bosses like U.C.O or Super Chick.
Do you agree that bosses who doesn’t give signs when damaged should have health bars: