This game is bonkers difficult near the end - its clear that you didn't have enough time to balance it so you said fuck it and just made it absurd (or its an exponential algorithm) the farthest i can get is wave 13.
that being said the art and design in this game are incredible. The ideas in this are amazing - even despite the balance issues, each plant feels unique and useful (aside from cali poppy and perhaps turnip), and the gameplay loop is great (if a little simple). Taken further (and perhaps with a separate gameplay loop?) this could easily be developed into a full game.