info-beamer pi (the software that runs in the Pi and drives the output) doesn't expose OpenGL directly at a very low level. Instead it provides a higher level API to draw and move images, fonts and videos around (see https://info-beamer.com/doc/info-beamer#referencemanual for the complete API). So it's indeed similar to Löve. As a programmer you really don't have to know OpenGL to get anything done. Right now info-beamer pi doesn't have SVG support but images and even videos get you pretty far for most effects I can think of.