Thanks for the suggestion, and I agree - it's definitely something I'd like to improve, but since I do this for fun in my free time I have limited time and try to focus on the science / data-analysis side. Thankfully Sina was kind enough to make it look much better.
Perhaps you would enjoy one of our super-quick batteries: try creating your own experiment and choose "Telepath" under "Special". It has three tests in two minutes total time and doesn't give you much time to relax.
If you are impatient you can try designing your own experiment that will use a shorter battery. The answers: 1. To stop a test in the middle, just click on the Quantified Mind logo and it will take you out of the test with no negative consequences. 2. That actually depends on the experiment - for most experiments we need complete data so you should complete all tests, but for some, you will see an "end session" button show up after you complete the first test, allowing you to save a partial result.
Actually, this has nothing to do right now with my Stanford research. I do computational biology for my PhD, not psychology. I built Quantified Mind because I want to discover effective ways to boost cognitive abilities and slow down age-related cognitive decline, and I did not find any existing tools that are sufficiently precise and give me the kind of access I want to the data. It's all about doing science and making discoveries about the associations between our actions and our cognition.