It is a very well-designed language for many (although of course not all) applications. Most of the ecosystem revolves around scientific computing so you may find there is a bit of a learning curve / sparse existing libraries if you want to use it for game development.
Also, on the language side, Julia is optimized for total throughput, which means even though it is easy to write extremely fast code, it sometimes suffers latency issues during stop-the-world garbage collection or JIT compilation. Julia gives the experienced developer tools to avoid this, but especially for those less practiced with the language it could potentially be an obstacle for real-time games like FPS--of course if you are developing a turn-based game this is less of a concern.
Also, on the language side, Julia is optimized for total throughput, which means even though it is easy to write extremely fast code, it sometimes suffers latency issues during stop-the-world garbage collection or JIT compilation. Julia gives the experienced developer tools to avoid this, but especially for those less practiced with the language it could potentially be an obstacle for real-time games like FPS--of course if you are developing a turn-based game this is less of a concern.