Here's some changes introduced from builds 1.5.1a and 1.6:

1.5.1a
-Reduced gamepad input lag

1.6
-Control sticks are now fully-compatible! (I still recommend D-pad controls for shmup precision, but the stick option exists for players who want it)
-All connected gamepads can be used instead of just gamepad index 0
-Visual clarity update to boss 4 arena
-Devolution phase 2's drop bomb attack has a reduced area of effect (RNG made it sometimes unavoidable)
-Slight tweaks to achievement descriptions
-Enemy bullets no longer hurt player after boss is already dead and fade off-screen

A player requested the boss healthbar to be moved behind player bullets, I tested it but couldn't at this time because bullets and enemies exist on the same layer, I would have to re-write the Z-sorting system. I apologize in advance.

Have some Rajaburn art as a treat :)