The biggest feature I need currently is a way to go back to the main menu without having to die.
-Perhaps pressing on the score numbers on the top right brings up a pause menu of sort?
-The achievement indicator for "Certifies Fly Addict" comes up too often to be either meaningful or helpful IMHO.
-It's hard to see the health on the bigger flies. (Is it not supposed to have one?)
-I think it'd be better to have bonus given out not on if ANY flies were hurt but individually.
It seems like you get 0 bonus if any one of the flies were hurt but I don't think that's (IMO)