I think a better explanation of the churches would help(do you have the option to switch what's enhanced? Does it add the +1 only at the same church or any?)
Wait, a programmer had the foresight to bind the scroll-wheel to the play area but not the mouse? I don't think I've seen that since... cursor thief was new.
If level 50 is giving you trouble, keep in mind that spawns are now coming from on screen, so walking the wall shooting generally toward the direction you're intending to travel, cheating the angle toward the center, is the easiest time I've had.
I really like how you can finish some levels with plenty to spare and some have to be exact order. Sometimes(as it is) the controls don't read if you hit them in a certain order(usually 'right-jump-jump' will not work but 'jump-right-jump' tends to be fine) also keyboard select works fine but the animation sometimes starts off screen and first press selects two or something weird like that.
Bouncing off of the walls is a HUGE booster when it comes to dodging. Hugging the wall prevents some weapons from firing.
The gears repair your ship as you fight. This can be leveraged.
The homing things last longer than is worth dealing with, run into them and move on.
Leave a medium ship then explode all of the mines at once so you can heal up before next wave.
Switching targets is not worth learning, especially since it removes a finger from directional controls.
You can switch ships in the middle of a level, can hit you with cool-down on your 2w.
Some ships satellites must be destroyed to drop shields.
I counted to ~7 between lightning orbs. On "The Big Guns" these don't spawn in at the same time. They also don't always spawn with their shields. If RNG gives you two giant ships' satellites within the shield of the other, switch to Weapon X, time shift and switch to something with a little more firepower. Going after ships as they spawn should make replay easier.