Thank you for feedback! I am glad you like it.
Yea there is a limit for plants, past fully grown point they live a bit and then disappear leaving the empty space for new plants. There is an odd sound effect for when the player cast the light, it is kind of an actual sound of the Sun provided by NASA for global use (that what i got when googled "sound of the Sun"), it is in low frequency and probably could be covered by other game sounds, making it almost impossible to hear.