I'm not sure if some artifact of my abandoned wall jump mechanic or just general Unity Physics Jank is to blame for the magic boost corners, but I'm sure it's one of the two. Unfortunately I was originally working on something ridiculously overambitious and had to bash this out on the last day when I realised there was no way I could finish the first one to any reasonable degree, so there was no time to smooth off the rough edges in the end.
Not that it matters, but the original was similar to the arena game and one script sumo, losing abilities over time. Good to see others actually managed to implement the idea, but at least I've learned something about setting realistic goals for next time round.
Glad you enjoyed it!