To play Pixel Express you will need a minimum CPU equivalent to an Intel Core 2 Duo E7400. Pixel Express system requirements state that you will need at least 2 GB of RAM. The cheapest graphics card you can play it on is an ATI Radeon 3000. You will need at least 300 MB of free disk space to install Pixel Express.
Pixel Express will run on PC system with Windows XP and upwards. Additionally it has a Mac version.
Minimum System Requirements
CPU
Intel Core 2 Duo 2.8GHz or equivalent
RAM
2 GB RAM
OS
Mac OS X Lion 10.7
HDD Space
300 MB available space
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