We played another game, with three players online (on Discord) and one local. I did not play, but ran the game. I had just as much fun.
We gave each player a small/medium tractor, with the ability to upgrade on crossing the opposite edge. Only one tractor per side could upgrade, giving a bit of intra-team competition.
I have less detail in this report, but it is still a Google Slides format. Click to proceed at your own pace.