In order for you to play Backpack Hero on Linux with minimal graphics settings, your computer must meet the following requirements
Operating System:
Ubuntu 20.04, Ubuntu 18.04, and CentOS 7
Processor (CPU):
1.1 GHz Processor
Memory (RAM):
1 GB RAM
Graphics Card:
OpenGL 3.2+, Vulkan capable.
Storage:
250 MB available space