The speedup seems to only trigger once you hold one direction for a certain time and then switching to the other. I initially assumed that I would accelerate at all times while spinning (I interpreted the arrows that way) and so it was difficult to get into it. Later on as I gained more of a feeling of the mechanic, I found edges quite punishing as I lost all my built up progress instantly (... then again. I'm bad at racing games in general). Just wanted to give you this perspective, feel free to do with it what you want ^^ I'm really impressed with the thumbnail art btw!