In order for you to play Pikuniku on Linux with minimal graphics settings, your computer must meet the following requirements
Operating System:
Ubuntu 16.04, 18.04, 18.10, Mint 19 x86/x64
Processor (CPU):
Intel Core2 Duo E4300 (2 * 1800) or equivalent
Memory (RAM):
2 GB RAM
Graphics Card:
GeForce 9600 GT (512 MB)
Storage:
300 MB available space
In order to play Pikuniku on Linux with maximum graphics settings, you need a computer with a configuration no worse than the following
Operating System:
Ubuntu 18.10 x64
Processor (CPU):
Intel i7 – 4771 (4 * 3500)
Memory (RAM):
8 GB RAM
Graphics Card:
GeForce GTX 970