A real shame
There is great potential for this game - I feel that it's absolutely gutting that there were so many pitfalls, which stopped me from enjoying this game the the full extent of its potential.
As you walk along in the mine, there are idle pockets that give the impression of a maze game, but with one fatal issue - you can't get out of these holes. Why not have ladders in there, or more likely, a precarious looking wooden bridge across it, that you might have to repair, lest it cave in and then trap you good and proper?
Some issues with the controls did give the whole thing an issue, as you try to walk along a straight line and the guy seems incapable of walking up a slight gradient in a slope, which does make it annoying. Combined with the other issues within the game, it does even go so far as to become monotonous.
I would suggest a complete overhaul of the mechanics of the piece - why not have tanks of oxygen lying around, to give you more time in the mine? Collect them like powerups, along with things like drills, precious minerals, clues, more tools, which will help you build parts of the mine back up, as you might be trying to rescue some of your friends and / or colleagues. A plot is a must for a game like this, as it would give people some idea of what medals they are trying to get hold of.
Throw in a space bar command, where you can use tools, such as the drills and see what this will lead you towards, since there is so much potential, with games such as Minecraft making a stab at the modern games industry.
[Review Request Club]