Hello matt, it appears that I have the same problem.
My specs
OS: Arch Linux
Kernel: x86_64 Linux 4.16.6-1-ARCH
CPU: AMD FX-8800P Radeon R7, 12 Compute Cores 4C+8G @ 4x 2.1GHz
GPU: AMD/ATI R8 2GB
RAM: 2729MiB / 11007MiB
Great game, thx for bringing this to Linux :)