Here's a prototype I've made that utilises a one button approach. I had a lot of different ideas on the gameplay, and I boringly went for a farming sim.

Your tractor will follow along a path. Hold down any key to stop the tractor and change the angle. Release the key to start driving in that direction.

When your tractor comes to an intersection, it will rotate automatically between the two routes. Tap any key to follow the route that the tractor is facing.

Drive through tools to pick them up:

Plough: Ploughs grass blocks so that you can plant seeds.

Watering can: Waters grass blocks.  Unneeded on rainy days! Refill by driving near the ponds (blue ovals).

Planter: Plant seeds in ploughed grass blocks. Purchase seeds from the crate.

Cultivator: When the seeds are fully grown, use the cultivator (it's supposed to be a claw) to pick up the plants. Drive through the shop to sell.

You can purchase a selection of upgrades which range from increasing your speed to making seeds cheaper.

Credits:

Icon pack: https://khushmeen.com/icons.html

https://www.dafont.com/farmhouse-7.font

https://www.dafont.com/hello-farmer.font

Sailing - Telecasted (YouTube Studio)

https://freesound.org/people/BenDrain/sounds/488008/ - Engine

https://freesound.org/people/milkotz/sounds/613739/ - Braking

https://freesound.org/people/dkiller2204/sounds/422971/ - Pick up

https://freesound.org/people/Pogmog/sounds/393910/ - Gain money

https://freesound.org/people/voho/sounds/320485/ - Shovel

https://freesound.org/people/Axlinico/sounds/577487/ - Planting

"Water, Pouring, A.wav" by InspectorJ (www.jshaw.co.uk) of Freesound.org

https://freesound.org/people/Zott820/sounds/568471/ - Glug

https://freesound.org/people/unfa/sounds/245645/ - Pop

https://freesound.org/people/straget/sounds/531947/ - Rain

https://freesound.org/people/bone666138/sounds/198876/ - Crash