Sunman was originally a Superman game until Sunsoft lost the licensing. To data, there are two prototypes. One contains one level with Superman as a playable character, and the other is a much more complete game with the new super hero, Sunman. Despite Sunsoft having their name all over this game, EIM actually developed this game judging by the credits.
The gameplay is very similar to Batman for the NES. You can walk, jump, and punch just like Batman. Sunman overall has slippery controls but at least Sunman can fly. The game is pretty hard.
The graphics on the other hand, are very nice. They are bright, colorful and detailed.
The music sounds quite bad. It's mostly the instruments that ruin potentially of great tracks.
Sunman is an alright game. Definitely not as good as Batman, but it's worth checking out.

This is the complete conversion of the game Sunman for the NES to the game it was originally meant to be, Superman. The graphics have been changed to that of the Superman rom, as well as the title screen and cutscenes. Download and Enjoy!!!

Name: Sunman (Europe) (Proto)
SHA-1: 326E2F4D3BE11A9CD8E7A0C8DC345BA9ECC7D1A9
MD5: 2E828058A1BD96D04ECDD04954E54C30
CRC32: 2BCE4DC7