@general_proton Blender's 2D Grease Pencil is the closest thing to Flash atm and it's free. Simple to mark keyframes, split things and animate them separately. It's all still in a 3D space, so you may "break" stuff out and cast shadows among other stuff if you want. Tweening is also there.
Today I graduated, a degree in design. This is an art of emery from my awesome buddy @AfroEagle, thanks to highguard I cannot draw an art for this important day. But yeah after 6 years in development, now I can start real life.