| Aspect | Official/Kongregate Version | Unblocked Clones | |--------|-----------------------------|------------------| | Ads | Yes (interstitial, video) | None (or pop-ups on shady sites) | | Saving progress | LocalStorage/cloud | Often broken – reset on refresh | | Physics stability | High | Variable – some ports have dropped frames | | Level count | 40+ | Often only first 15–20 levels | | Multiplayer | Sometimes (async leaderboards) | No |