Bloody Rally Show from February 2020 was probably one of the best top-down racers I've played in a long time, and it now has a free Bloody Rally Show: Prologue version you can try out.
Read the full article here: https://www.gamingonlinux.com/2020/10/bloody-rally-show-prologue-is-out-now-to-give-you-a-taste-of-some-frantic-2d-racing