Syrmex Electronics is a Mexican company and Snow Brothers 3 is the first Mexican coin-op video games. The game appears to be a hack of the original Toaplan "Snow Bros. - Nick & Tom
The development name of this game was "Snow Brothers 3 - Prehistoric Adventure".
The background of Stage 20 is a picture of Violator from Spawn.
The 2 bosses of Stage 30 are Cacodemons from the PC game Doom.