PPI stands for Pixels Per Inch. If you never put the pixels on something that can be measured by inches, then the number you put there literally doesn't matter, it doesn't change how many pixels the actual image has. What it changes is how big it will print on paper if you were to ever print it, a higher ppi means it's going to fit more of your image in a smaller space, lower means it's spread out and less sharp (though that also depends on how many ppi your printer can handle). 300 ppi is a fairly standard resolution, it prints well in most cases and is the resolution for a high end monitor.
I really tried to pull off something for halloween, but I don't feel like going on. I feel like the plot I was building was too generic, and I couldn't connect to it as I do with other projects. On the bright side, I've been working on my cosmic-puzzle project, so far I think the core mechanics are working properly, so I'll be creating some large test maps to see how it works out.
M.Healer: I'm wearing M.Mage's Costume. M.Mage: I'm wearing M.Healer's Costume. M.Knight: Why not using the Scary Costume like me,The Scary Frankenstein? M.Healer: Err…Because we have low of Budget. M.Mage: Yeah,right.