First, I really hope you're feeling better. That aside, I still think you have a really cool idea here. So many small things that looked and felt really good. (I'm especially curious about getting it moving up walls...)
Two small things I would point out. First, once I hit about level 9 or 10, it started lagging the whole browser. Tried a different one just to test, same result. Unsure of what would be causing it though. Second, it felt pretty easy once you got to a certain point. Could pretty much one-shot villagers. Likely just a balance thing that got delayed with the sickness.
Even with those two things, it's still really impressive what you produced. Great job!