GT? Oh the Gutter Trash one. Sorry, I don't own that. Heh. Limited income (disability) so I don't often buy things.
If you'd like a suggested tweak though for this game, perhaps the boss could have some sort of health bar because blindly attacking it repeatedly got a bit annoying because I couldn't tell how damaged he was. I was worried I'd be stuck there in an endless loop of attacking, dodging, and recovering energy. xD