Actual driving mode

Knockout mode

Do you bake all the non-moving level elements (roads and stuff like that) into one collision mesh?

steering limit curves/presets?

Disable "Author Time" Medals in adventure until beating every track once

Gravitational shenanigans

"Sudden Death" to give a last chance to finish your run on a map when the timer runs out

Split Screen Level Playlist

Respawing in split screen/ multiplayer

Checkpoint Editor

Subscribing to tracks without auto-subscribe

Suggestion: Artificial Horizon

upscaler support

Track parts ideas