I just instinctively used the right-mouse button to swap, so it's nice that that worked (doesn't say on the info page). I didn't see anything telling me that 7 dead dogs is Game Over (and I assume cats with helmets increase the invasion bar, but not if they increase it enough to be relevant? ).
I know that you can't swap after firing, but would be nice to have an indicator or something over the character that say if you have a swap buffered (This wasn't really a problem after getting used to it tho).
I really liked the Theme Interpretation, and the music and art and game setting all worked great together.