I built a free UPSC PYQ simulator to make practice feel closer to the real exam and now I'm looking for feedback

Disclosure: I built this website and I am sharing it for feedback, not as a paid course or coaching promotion.

The tool is here: https://upscexam.replit.app/

I built it around one problem: PYQ practice often feels too casual when done from PDFs or question lists, while the actual Prelims environment is time-bound and has negative marking. This tool lets you attempt UPSC Prelims PYQs in a timed exam mode, try a daily 10-question challenge, practice by topics such as Polity, Environment, History, Geography, Economy, and Science & Technology, and review performance afterwards.

If you are preparing for Prelims, could you please try and tell me three things: whether the interface feels close enough to exam pressure, whether the explanations/results are useful, and what feature would make you use it regularly?

The core hypothesis is that aspirants do not only need more questions; they need practice that recreates exam pressure. The tool currently offers timed PYQ tests, negative marking, topic-wise practice, daily 10-minute challenges, and result review.

I am trying to validate whether this is a strong enough wedge for an exam-prep product.

Note:
a. This is totally free
b. There's no need to sign up
c. There are no ads

It is hosted on Replit itself but after I get the feedback and with improvements, I'll move it to custom domain.