There is potential here, as it was a learning experience. My advice would, the sound would have made a big difference. Some sought jeopardy is needed, and maybe some sought spike that falls and needs to be avoided. I like the tipping of the cart but need some reason for this.
Viewing post in Ore Cart (Trijam 229: Keep on the rails) jam comments
Nice ideas. Many people in jams don't even listen to the sounds, but their own music that's playing in the background, especially if they are a streamer, so I don't take audio as very high priority and should be done last in any project, if there's even time to make sounds. I thought of some difficulty-increasing elements like puddles or obstacles you pull the cart through, but I was really on my last minutes before going to sleep and I just joined the jam at the very end when I could, so I just left it at where it was at that point.