An Intel Pentium 4 2.00GHz CPU is required at a minimum to run Fluffy. In terms of game file size, you will need at least 300 MB of free disk space available. Fluffy system requirements state that you will need at least 1000 MB of RAM. The cheapest graphics card you can play it on is an NVIDIA GeForce 6100.
Fluffy will run on PC system with 7+ and upwards.