Released in 1982 by Big Five Software, and designed and programmed by Bill Hogue (he programmed many games for the Radio Shack/Tandy TRS-80 computer in the late 70s), Miner 2049er was made available for the Atari consoles and 8-bit home computers, Apple II, Commodore Vic-20 and C64, Colecovision (featured in the video clip above) and a few other formats. However, I believe the game was never released for the Sinclair or Amstrad computers. A sequel, Bounty Bob Strikes Back (I bought this for my Atari 800XL and loved it!) was also released in 1985, although it wasn't as successful as Miner 2049er.
In this challenging platform game you played the role of Bounty Bob, who's mission was to thoroughly explore an abandoned mine. As Bob walked over floor sections in the mine they would change colour. When you managed to make all of the floor sections change colour you could move on to the next level, which was even more challenging.
There were many radioactive creatures to avoid and objects left behind by previous miners needed to be collected. On picking up an object the radioactive creatures would turn green and smile, allowing Bob to pick them up - a similiar idea to Pac-Man where after collecting a large power pill the ghosts would look unhappy and could then be collected.
There were a total of ten different levels in Miner 2049er, and this was considered a big game in the early 80s due to limited memory in many machines.
Listen to the uploader of this video giving his rather unique and "off the cuff" thoughts on the game, as he plays it on an Atari 65XE for the first time.
This is Part 1 of 2 of a complete walkthrough of the game and the video is downloadable here