LightWalk system requirements state that you will need at least 4 GB of RAM. You will need at least 1 GB of free disk space to install LightWalk. Make sure your have 2 GB of free disk space in order to install LightWalk. To play LightWalk you will need a minimum CPU equivalent to an Intel Core 2 Duo E8400. The cheapest graphics card you can play it on is an NVIDIA GeForce 510.
LightWalk will run on PC system with 7 and upwards.