Super insightful! I appreciate that you played and gave me this feedback. A lot of this is stuff I tried to put in, or had to cut for time or game-breaking bugs. Downfall of working on my own.
I've already started designing a full version of the game, and I intend to include modes like custom kart design, multi-player, and more. I'm planning to find some people for things like art and music so I can focus purely on the programming for the REAL game. Tons of QoL stuff is on the list, and even more gameplay features. Full game will absolutely be worthy of sinking hours into.