Millie system requirements state that you will need at least 4 GB of RAM. Provided that you have at least an NVIDIA GeForce 7800 GT graphics card you can play the game. An Intel Core 2 Duo E7400 CPU is required at a minimum to run Millie.
Millie will run on PC system with Windows 7 and upwards. Additionally it has Mac and Linux versions.
Minimum System Requirements
CPU
OSX 10
OS
OSX 10
Graphics Card
nVidia 320M or higher, or Radeon 7000 or higher, or Intel HD 3000 or higher