- The crowdfunding contract is now a "driveable" playground. Earlier you mostly read about it. Now there's a live interactive surface where you
actually fund the contract, watch it hit its goal, claim the funds, or trigger a refund when it falls short. Seeing the rules play out beats
reading about them.
- The AI tutor got noticeably less pedantic. They retuned the grader so it judges what the question actually asked instead of checking your
answer against a hidden checklist. A correct plain-English answer passes now — it stopped failing me for not using the exact "right" words.
This was the thing that annoyed me most last time, so nice to see it fixed.
- Your progress saves now. Close the tab and come back — your answers and place are still there (looks like localStorage + shareable URLs). Big
quality-of-life win.
- New visual explainers. Added animated illustrations + interactive widgets for the abstract stuff — how thousands of "nodes" share one state,
how a transaction travels through the network, the vending-machine metaphor for smart contracts. Chapters 1–4 also got a content/copy cleanup.
- The code editor finally respects light/dark mode — it was washed out and inconsistent before, now it matches the rest of the page. Plus a
slide-out code panel so you can peek at the full file you're editing.
Still early and rough in spots, but it's clearly being actively worked on and the core "learn by actually doing it" approach keeps getting better. Worth another look if you tried it before.
Checking out what they shipped recently...
Still early and rough in spots, but it's clearly being actively worked on and the core "learn by actually doing it" approach keeps getting better. Worth another look if you tried it before.