Recently there was an update to Gimkit that added platforming physics to Gimkit Creative. This unintentionally had the side effect of changing the physics of Don't Look Down to where speed boosts are noticeably less powerful. All runs using the old physics have been moved to a miscellaneous category. This physics change hopefully will not last since the creator of the game has confirmed that the physics change to Don't Look Down was unintentional and he's going to try his best to revert it back to normal.
You probably have already noticed that the Don't Look Down leaderboards seem to have reset once again. This is due to a new gamemode having to be released, which has a feature that increases gim speed. The creator of the game explained that speed boosts were messing with this gamemode and making gim