This is an amazing entry and most of my concerns are pretty minor. I think the player move speed is a bit too fast and it takes too long to decelerate. The inventory bar could do with a bit more spacing above and below it which could be done by raising the ground a bit. I crashed the game on day 8 by trying to dismantle a planter which was unfortunate.
The gameplay loop is very satisfying and I really like the shop system. The art style and colour choices are nice and vibrant as well. This could easily be expanded into a full game with more plant and enemy types, buildings, weapons, etc.
Nice game!