File this one under "surprised". It seems that RasterSoft has developed and released Frog Feast on cartridge for the Sega Genesis (Mega Drive compatible), which is also available on Sega CD, SNK Neo Geo CD & MVS, IGM PGM and Capcom CPS-1 formats. Other versions planned include Commodore Amiga CD32, FM Towns Marty, Philips CD-I, NEC Turbo Duo and Atari Jaguar CD, though all of those have preview versions already available for download. RasterSoft has also seen fit to release the source code to several of the versions.
It seems the game was inspired by Mattel's original 1982 classic Frog Bog, which also spawned an Atari 2600 version called Frogs and Flies. It seems though that Mattel itself was inspired by Gremlin's 1978 arcade game, Frogs, which utilized a background overlay. While is some ways Frog Feast is actually graphically less rich than the Mattel version(!), it's refreshing to see a homebrew game inspired by something a bit different than the norm.