Your kitten is hungry all the time because Felix is such a poor quality food. The meat content in Felix is only about 4% and the rest is bulked out with cereals and grains that NO cat needs. Try switching to a better content meat food and you will see the amount your kitten eats drop dramatically.
Kittens should be able to self-regulate so with mine, it's 'all you can eat' :)
My boy has mainly raw food (I get mine from two companies called 'Honeys' and 'Natural Instinct') at the moment and I also make my own (although you'd have to do some research to make sure you had the meat-bone-organ ratio correct so your kitten was getting the right levels of nutrients).
Some good brands of wet food include 'Lily's Kitchen', which some Supermarkets stock.
Then from the Zooplus website we get:
Animonda Carny
Grau Kitten
Then when they are adults other good brands include:
OmNomNom
Macs
~ Both of which you can get from the Happy Cat Company.
All of the above contain high meat contents and no rubbish.
My kitten has free run of the house and was waking us up at 5.00am but now he's a little older ... nearly four and a half months, he's letting us sleep later! I make sure to feed him before I go to bed about 11.00pm and that helps.
So ...
Avoid Dry! Dry is the worst food to feed ANY kitten or cat.
Some brands of wet food are good.
RAW is best. Please consider raw feeding :D