Pretty good
This was pretty good, quite challenging, and indeed neat.
You could've added some sort of weapon that you could acquire and use outside of a pill (not a gun, laser, etc). The chances of getting the items you needed weren't necessarily high enough for me either, which proved to make the game difficult.
Difficulty isn't a bad thing, but you may want to give someone more high chances of succeeding. This way you could even give the option of changing the difficulty.
Keep up the good work. :)