In the latest version the level only requires 9000 points and dead plants don't deduct or add points, are you sure you're playing on the latest version?
Join the official MvZ2 Discord server https://discord.com/invite/pf2regyxpm . There's a mod called MvZ2 EXPAND which aims to continue the GMS version of the game. We're currently discussing about it on this server haha.
You might have noticed that in newer updates, the game will also display its sub-version in the GAME START screen.
Offline - Ensures the smoothest experience with the game, but does not have any online modes exclusive to Main sub-version. (Duel mode is still available if you're connected to the Internet)
Shunt - Basically Offline sub-version but hosted online.
Main - Has additional online features and game modes (like register/login, cloud saves, level hub in Level Creator, Skill Tournament game mode, etc.). The only server of the Main sub-version is at https://pvz.jiangnangame.com/play/index.html . Go there to experience new features and game modes exclusive to the Main sub-version.
The Ultimate Clicker - In Reward Level? (Randomly accessed after beating Aurora Icefield 30. Replay it over and over ‘til you get it), keep clicking any of the seed packets until you get the achievement.
The Broken Black Mirror - After beating Foggy 14, rapid click the black mirror that dropped to break it.
