Great fun! Really loved the loot box drop at the start and all the additional visual elements during the races, managed to get up to day 15 on my first try.
If you ever take the concept further, some additional story elements and some form of recovery if you lose the race would really round things out, as well as some additional blockers on the race track that need to be factored into the powerup selections between races to add some extra depth to the strategy.
All in all, great game! -- Chris