Truly nightmarish in a way that I believe is nearing perfection. I absolutely almost got filtered by the tutorial where I could not complete the lockpicking segment, so it became very clear to me that the only path to success was to ensure that my engine simply never take damage.
My favorite of the mechanics was the oil tank, which makes sense since it wasn't the lockpicking I couldn't do, and the other two were just spam clicking :P But it was nice in that you could clearly see problems approaching and it gave you some time to fix them. It also wasn't an immediate fail state (even if close) if a single leak spring for a fraction of a second.
Having to spam click as fast as possible was a bit of a limiting factor on how long I could play, and I was far more beat up than my engine was before the three laps were over. I could see this concept having a lot of promise if it were slowed down by several factors and didn't demand so much physicality out of the player. But the one-mouse-band approach of running all the different car systems was fun, and the art was cute, and the music was fitting, so overall I had a pretty fond impression of the game :)