This "remake" appears to be a low-cost (budget) port to the PC, as an attempt to test the water (for perhaps better ports) :
http://www.pcgamer.com/2013/07/11/new ... devotion-to-the-original/The graphics appear to be the original ones, but with some automated filters enhancing them (and the option to turn them off if you don't like them).
The levels & general difficulty seem to be unchanged (risky IMHO).
I'd have suspected they were using an Amiga emulator, if it wasn't for the fact that they support networked multiplayer.