Endless Forms Most Beautiful has an interesting history. It was originally released by Dave Hughes early in 2012 for the ZX Spectrum. Yes, the ZX Spectrum, a machine that first hit the market in 1982. There is still a community developing for the Spectrum over at World of Spectrum, although I imagine many of the games are actually played through emulation these days.
Anyway, Locomalito (known for their retro-styled freeware games like Hydorah and l’Abbaye Des Morts) were looking for a game to remake for PC, and decided that Endless Forms Most Beautiful was an ideal candidate. The port not only updates the graphics with a more recent retro aesthetic, but also apparently lowered the difficulty significantly to make it more accessible to newcomers. Now, you can play this remake of the arcarde-style game for free on your PC.