The original awesome project upon which this one is styled is EnemyAirship's 'Giant 7x7ft 8-bit Raccoon Mario rug' which everyone should see!
If you're interested the way I made mine is below:
Pattern for squares
1) chain 6 and join ends of chain
2) chain2 to raise row height, dc2 in centre of circle, chain3, ~dc3 in centre of circle, chain3~ 3 times, then join to start of row2.
3) chain 2 to raise row height, hdc2 in gap formed by the 3 chains in the row below, ~chain3, hdc3, chain1, hdc3~ 3 times, chain3, hdc3, chain1
join to top of first hdc
Cut off leaving a tail
Sew squares together following this design:
Here is David sitting on the work in progress:I love how it looks in our house :)