Hi, so I have not played the full game, but I wanted to say that I think it is a very good concept and could be fun, however some things make it very hard to read and understand what you are doing.
First of all the game window and the UI. It would be very nice if you could have made the game window larger and added a fullscreen mode. Then you also probably would not have to make the window with the upgrades to be scrolled. It was also unclear at the start what diamond G, diamond B, etc. meant, maybe you could color them in the buying things, instead of the letters. What also would be nice is a explanation of how much you need to mow for a trophee / star (?) and how much trophees / stars it would give.
Another point that I have is that I sadly genuinely can not understand what is happpening at the screen. Like you get dropped into a field with a mower and you have to move, that is clear. But I don't know what the bar at the bottom means and the stall risk and when it goes up, so maybe you could solve that with a tutorial. That could also help a bit with the terminology, since I can not understand what most of the upgrades do. It is fine in the later stages, but I want to know what I am actually improving. Like what is Throttle, (speed?), Deck width (mowing witdth?), impact guard, handling (controllability, or like rotation speed?), fuel safety.
Lastly it would be nice if the other, not animated park grass would have a bit more of a visual feedback, since I can't tell what I have mowed and not.
I know that I said a lot of shit about the game, but I think it really has potential. The aesthetic, colors, and sprites are rly nice and if the UI issues would be fixed, I think it can get a high place in the jam! good luck to you.