Found several related bugs of some kind.
- Plants can have their growth suppressed with launchers above them. Removing the launcher gives a huge accumulated growth spurt.
- There’s a ceiling to how high you can fly, but suppressed+released plants go higher, and beyond flamethrower range.
- Perhaps as a result of the above, my game broke its physics - everything stopped moving except for the player. Flamethrower flames hang in midair, material picked up doesn’t fall, etc. Saving and reloading doesn’t fix it.