i've seen lots of community posts where they have many rows of trees. How does one do this?

I crashed after about 6 or so rows of trees all firing at start of 26th wave. Was playing as Boy.

I've been playing this game for a bit, and it seems like there's some kind of performance issue. Is anyone else having this issue with many powers/trees/projectiles? Based on the player log, this seems to be the error. ERROR: SymGetSymFromAddr64, GetLastError: 'Attempt to access invalid address.' (Address: 00007FF95E244DD0) 0x00007FF95E244DD0 (UnityPlayer) (function-name not available)...

gardener can't get any upgrades, nor there is any description of what different types do

I'm not sure if it was too many trees, or too many meteor attacks, but my game froze and crashed so close to the end. I got this screenshot as it was crashing https://imgur.com/mBYgrXB