Vectors would require rigged character animations, where you just connect body parts, then tween and swap them around instead of drawing frame by frame. It has it's advantages like the zooming in, and it would also make it easier to swap outfits for Max.
I draw frame by frame instead of a rig for a few reasons:
It gives way more artistic freedom of poses and transformations.
I'm not stuck with annoying layer issues, overlap and robot-like movements.
I have way more freedom when it comes to adding stuff like liquids and cum.
The downside is that it's a lot of intense work, so I keep the resolution somewhat small in order to keep my work fun and doable for 1 person.
Glad you like the game!