What a great take on a tower defense style game. I love how everything is connected via roots. For a moment I forgot about having to reach the water, but then by wave #14 I managed to reach it. Having to grow specific types of pumpkins to earn more stars/growth points is clever. I never figured out what the star plant does.
I tried going fullscreen using F11, but only afterwards read here in the comments that the correct key is F 😭 I think in GameMaker you can change the game project settings to allow window scaling via the top buttons and dragging the edges too.
The game looks and sounds great as well. The tiny sprites combine very well with the mouth sound effects.