Interesting, I liked the ending especially. When the ending happened I think the ground got very hot and I barely just missed the van. But after trying it again I was able to get to the van before the ending happened and won before the main event even happened.
It's actually kind of fun, but there might be couple of things that could be improved upon it, because it could lead some people to think the game is bad if they don't take a closer look at it:
- If the quick intro camera sequence is not paid very close attention to, it may be disorienting and confusing and it's actually easier to start over and then notice it again more closely. A waypoint or a direction icon on where you should go may help with this.
- After you get enough minerals, the timer runs out or whatever causes the next part to happen, I wonder if there should be some more indications, especially because there's not much visual feedback or direction arrows. I wonder if a sound cue, someone talking in a radio saying get out of there even if it's some stock sound, etc. could be helpful to make it more obvious you should get to the van. Something besides just the text suddenly changing which may be possible to even miss.
Overall though I think you did a pretty good job, but I think the game has this sort of thing where on a quicker look, someone might think it's really bad actually, and it may require more giving it a chance. I think if it has that kind of feeling it may be a sign there's something a bit off with the game design or something, but personally I kind of liked it.