Indie game devs waste weeks hand-animating simple character movements like jumps or swings.
A visual editor could apply physics-based motion to pre-made sprites, with sliders for weight, momentum and elasticity.
Sell to game jam participants and Steam indie devs via a one-time purchase with asset pack DLCs.
Start with just basic pendulum physics for platformer swings, then expand to other motion types.
Biggest risk: professional tools like Spine already dominate the market for serious devs.