When run with the default, bundled Java runtime, the game runs in low-resolution mode on macOS. This results in horrible aliasing on things such as text and fancy leaves.

When run with an external version, this issue disappears. I only tested this with the version provided by:

brew install openjdk@16

Entering fullscreen via the in-game menu also crashes the game outright. This is also fixed by using a different runtime.

I get the following from the Homebrew version:

openjdk 16.0.1 2021-04-20

OpenJDK Runtime Environment Homebrew (build 16.0.1+0)

OpenJDK 64-Bit Server VM Homebrew (build 16.0.1+0, mixed mode, sharing)

I get the following from the bundled version:

openjdk 16.0.1 2021-04-20

OpenJDK Runtime Environment Microsoft-22300 (build 16.0.1+9)

OpenJDK 64-Bit Server VM Microsoft-22300 (build 16.0.1+9, mixed mode)