Increasing the amount of entries will increase your chances of winning BUT ONLY if your answers are correct! So if they're all correct then, yes, you will definitely have an increased chance of winning. But if you're not 100% correct and another entry is, then no, your multiple entries won't help you.
PXL CON is a Comic Con inspired artwork that I finished a while ago and here's (finally!) the reference map for it!
You can click the map itself to view more info about the character or view an alphabetical list via the REF LIST link above.