Last updated: 23 September 2026
Run the Tests in This Order
The single biggest mistake in troubleshooting a browser game is starting in the wrong place. People reinstall browsers, clear caches, and try three different games before discovering the network blocked the games category all along. The six tests below are ordered so that the fastest, cheapest checks come first and each one narrows the possibilities. Most problems are identified by Test 3.
Reading the Results
There are only three outcomes, and each one points somewhere different.
Network block
Other game sites fail, non-game sites work, and mobile data plays fine. The filter is category-based. Nothing local will fix it, and no game site can lift it. Play on a permitted network, or ask the administrator whether games are intentionally blocked.
Rendering problem
The page text loads but the game area fails, or a WebGL message appears. Enable hardware acceleration, update the browser and operating system, update the graphics driver, and test with extensions disabled. Managed devices may have WebGL switched off by policy.
The third outcome is a total outage: nothing loads at all, including non-game sites. That is a connection problem rather than anything related to games, and it sits outside this checklist.
The Most Common Real Cause
In practice, two causes account for the large majority of reports. The first is category filtering on a managed network, which is why the game works at home and not at school. The second is disabled hardware acceleration, which produces a loaded page with a dead or blank game area and a message about WebGL. The two look similar only if you never check whether the surrounding page text rendered — which is exactly what Test 4 is for.
Less common but worth knowing: an anti-fingerprinting extension that blocks canvas access can break WebGL games while leaving the rest of the web untouched, and an out-of-date graphics driver on an older machine can fail the same way after a browser update. Both are local, both are fixable, and both are identified by Tests 5 and 6.
What Not to Bother With
Several widely suggested fixes rarely work for this class of problem. Clearing cookies does not affect a network filter. Changing DNS servers does not bypass a category block that runs on the network. Switching browsers does not help with a network block, though it does help with rendering. Reinstalling the browser is almost never necessary. And installing an extension advertised as a game unblocker usually just moves the problem, while adding a third party to your browser.
The reason these suggestions persist is that they occasionally coincide with the problem resolving for an unrelated reason — a network policy changing, or an update landing in the background. Ordering the tests correctly avoids chasing coincidences.
Once It Loads, Playing Takes One Sentence
Controls are W for Player 1 and the Up Arrow (↑) for Player 2. Choose 1 Player or 2 Player, click once inside the frame so the keyboard registers, and play to five baskets. Courts, balls, and physics randomise after each basket, so no two rounds are the same. Everything runs on your machine once the page has loaded.
Frequently Asked Questions
Should I start with Test 1?+
Yes. Running the tests out of order is the most common waste of time — people start by reinstalling browsers when the network is blocking the site. Test 1 and Test 3 take seconds and settle the network question before anything else is touched.
What if every test passes but the game still fails?+
Then the failure is specific to this site on this device. Try another current browser, then check chrome://gpu for a WebGL message. If WebGL is unavailable everywhere, the device or its policy is the limit.
Is a VPN the answer?+
Not on a network you do not administer. Deliberately routing around a school or employer filter conflicts with the terms you agreed to, and on a managed device it may also breach device policy. The honest options are a permitted network or asking the administrator.
Why does this only happen at school?+
Because that is where the filter is. Home networks rarely block the games category, so the same laptop that fails at school works normally at home. The device did not change; the network did.
Does clearing the browser cache help?+
For a blocked site, no. For a rendering problem, occasionally, but updating the browser and enabling hardware acceleration resolve far more cases. Cache problems usually show up as a stale page rather than a blank game area.
Related Pages
For the background on how filters classify game sites, see basketball games unblocked. For this specific game and network access, see Basketball Random unblocked. Full controls, scoring, and single-player detail live on Basketball Random Game, and the basketball games hub links everything on the site.