I've got it down to a science now.
As you may already know, the blaze icon slows you down and the reblog doubles your snake length.
The trick here is to go around randomly, collecting icons until you get to a score of ~70-90. 100 is the absolute highest you should go before getting into the pattern.
The pattern for this version of snake is to go along the top row, starting from the left. Then, go down, up, down, up along all the columns and repeat
With this, and enough practice, eventually you should fill in every square
The reblogs and the blazes can be useful in their own ways.
The blaze kinda sucks in the beginning, as you want to try and get as many icons to get to 70-90s asap, but when you fully get into the pattern, it can be nice to slow down for a second and make sure you are correctly positioned to move the snake down and up
The reblogs are good in every way, as they can get you up to 70-90s really quick and, when you fully get into the pattern, can take away the moving tail, making it easier to focus
After implementing this and practicing (a lot) I can routinely get 300-400 score. I have yet to fill in every square, but that's just due to human error
So, if you want to impress your friends, or lack there of, now you know how to get a really good score in [tumblr] snek