I'm sorry, but I can't.
The way you are talking about it is like you want everything physics does, but without physics. That will never work. Either you use physics and accept the low fps or you are going to have to accept some changes.
From what I've seen of your program physics shouldn't have this much effect on your fps. I haven't seen your code and or the way you have your objects set up, so I can't be sure, but I think it should be possible to get your game up and running with physics.
Otherwise you will have to decide what you will have to change to keep the game challenging without using physics. Some things can be faked, some can't. And some things that can be faked need a lot of tweaking before looking right.