You had me at rogue-like twin stick sooter.
But anyway, I have honestly nothing bad to say about the game (besides that the controls on K+M could be better but you know that). The graphics, the visual and sound effects, the music, the UI, the smooth transitions and animations. Everything is really well done and fits together perfectly.
One bug I found is that on the shop screen (with zoomed in camera) you can still move around and go to the portal to the next level where you will still have the shop UI on the right. Pressing ESC then brings up the black transition circle and leaves you with a dark screen.