Heres a basic guide on getting A*** in Grand Prix in Super Indie Karts:

To get the Top Rank (A***) you have to get all 12 stars (3 each in a course) by:

-Collecting all Shrooms in the track (50cc- 1 Shroom, 100cc- 2 Shrooms, 150cc- 3 Shrooms)

-Collecing Jewels in the track (50cc- 10 Jewels, 100cc- 15 Jewels, 150cc- 20 Jewels)

-Getting 1st in the race

I recommed starting from 50cc to 150cc if you want to learn the Shroom locations (this also includes Mirror Mode)

For the Jewels, try getting a huge amount in the 1st laps.

The Shrooms are hidden on tough turns or off course, you need to manuever to get them. The reward is that you'll become invincible for a short time also you gain a speed boost and able to destroy obstacles (Recommend for comebacks or to gain more ground).

The AI wont be fooling around on the higher CCs they will try to prevent you on getting 1st, so get your A Game on the track and they will bombard you with items if your not careful. They might even steal your victory in the last second.

Most characters have different stats so try practicing with those characters if want to complete it. For new players try Time Trials when its available or by using the secret code.

If you want to see my A*** runs try looking for my videos in the SIK community or in YT www.youtube.com/user/apagan0075