In order for you to play Happy Room on Linux with minimal graphics settings, your computer must meet the following requirements
Processor (CPU):
Intel Core 2 Duo E4500 @ 2.2GHz or AMD Athlon 64 X2 5600+ @ 2.8 GHz
Memory (RAM):
4 GB RAM
Storage:
400 MB available space
In order to play Happy Room on Linux with maximum graphics settings, you need a computer with a configuration no worse than the following
Processor (CPU):
Intel Core i5 2300 or AMD FX6120
Memory (RAM):
4 GB RAM
Storage:
400 MB available space