Hello!
Every crop has a grow timer, and late growers have more value. The list goes like: potato, grain, watermelon and lastly pumpkin.
The game unfortunately has a major bug, causing lightning bolts to not kill the player and game over screens to not work . I managed to cause this bug at the last second, while I was trying to implement a secret "god mode", that's what the missing collision is for, you can get to places that you normally shouldn't be able to (basically the left-most part of the farm). It was supposed to be the easy mode for some players, but it kinda ruined the whole experience with that bug, sorry about that...
Thank you so much for playing and your detailed feedback. You rock!