A few ideas: * Processing * Love2D * Unity / Godot * Pygame In the past, Flash filled this niche, I think (although I never programmed in it). Looking at m

A few ideas: * Processing * Love2D * Unity / Godot * Pygame In the past, Flash filled this niche, I think (although I never programmed in it). Looking at my own list above, and others' responses, I don't think this niche has truly been filled, alas. Maybe a startup idea?