A fun expirience the waves lacked a sound effect to signalise that it begins the game kind of lacked any upgrades that could be done during the waves but with the way the mowing was design I guess you don't have to much breathing room. Another thing would be to imrove the driving model maybe as it felt very riggid even at higher speeds, but I never made a full driving model so I can't exactly tell you what to do about it.
But overall it's a great entry and I had fun with it kudos.