I liked this one. The timer only descending when you are not popping pills means the game becomes about path planning to avoid doubling back. Good work, and quite 'just one more go' y. Good work.
I'll second the people who noted odd key choice (it's hardly a FPS, so WASD seems odd... as a right hander that's a quite strange choice to make - play with left hand, or play with Right Hand over on the left of keyboard.