Adding the fast forward button is kinda complex because I would have to modify a lot of stuff, it's possible but not in my plans right now.

You can't download it because the game isn't compatible with android 14+, I'm working on a port to make that possible.

I may add that, but the method to collect sun in ND is way easier than in Replanted or Pvz1, since you only have to hold the click and it's not necessary to click every individual sun, it works like pvz2 I think.