To do this exercise in javascript is pretty silly. But as a systems developer, I can tell you that bit manipulation happens all over the place in my line of work.
I totally get what you mean about the skepticism, and I really didn't aim to sound like a spoilsport.
However, any would-be (I'm talking zero experience) programmer that looks to this for inspiration is going to be demotivated by not being able to come anywhere near this progress. Because it's not possible. It's deceiving. The website presents itself as a resume or a portfolio, and in a way it does feel like it's selling something: herself.
Yes Conway's Game of Life, Pixel Paint, etc. can be made in surprisingly limited time and code, but not by a novice programmer. We're talking about having to grasp variables, lists, function calls - basic stuff - that given no prior knowledge may take weeks alone.
This is someone with a solid understanding of programming and who has borrowed (very skillfully I'll say) from tutorials and examples - very good skills to have, but separate from her claim.
I have to ask: How on earth do you find the time to do this?
As much as I'd love to do this in order to get my hands dirty on web development and out of systems, I can't ever fathom having the free time available every day consecutively.
I mean, for someone "learn(ing) to code" on Day 1 and by Day 15 doing "Dropping Boxes", it just seems a little far fetched. Obviously you have had a good portion of coding experience and are using -some- level of resources, or you are a savant.
I don't mean to sound rude, I just feel like the readers deserve a deeper level of explanation and cited resources, rather than believing you reinvented Conway's Game of Life by day 108.
Edit: I have to add that this is all very excellent work and good on you for sticking to your goals so far. Clearly you are a very talented individual. Cheers.