This is one of those games where the bugs actually contribute to the gameplay. I particularly liked the speed boost glitch where it would generate so much impulse that you could skip across sections of track.
The lag everyone speaks off appeared to be worst when the player was near the AI. Fortunately for me, they couldn't conquer the grating with no collider, and this consigned them to their own loop of falling through the track and respawning. Truly, this is the most meta loop I have come across so far.
The ship handling was far too heavy for the track, the route was sometimes unclear, and parts of the track had missing or broken colliders. The power-ups were not obvious but did work, admittedly.
Despite all the issues, I can't deny that I did actually rather enjoy myself. Probably not in the way the developer intended, but even so, that's more than most AAA games can claim!