i wanna ask that when i complete the game i delete it right after so if new update comes out do i have to play the whole game again or can i start from the new part ?
On android, yes, unfortunately.
Android saves go completely within the app's data, which is lost upon uninstallation. There's a workaround on my part, but I haven't gotten to figuring it out yet. I'd need to thoroughly investigate Android file access to make sure I know how to code it. But it's on my to-do list.
If you're on desktop, then your saves will be fine.