I think it would be pretty cool if we could by permanent energy increases for feez in intervals of like 5 ore something, it would help players who are trying to go through adventure mode as the can only challenge a boss twice (at best) after making through a campaign. It is just something i as a player would find helpful.

sure it could be helpful, but i think Feerrik want that you buy energie everytime (with Feez) you need it and not only once XD

I mean this is so in a FreeToPlayGame.

true but as i said it only be a one time increase that lasted similar to the effects of the exp and crystal cards. And just like them you could only have one in your collection. So they would be cards you buy in store, for example one would be a 10 energy card and one would be a 30 energy card (make the total energy 100 instead of 60) and you would have to by them for feez (of course i will let Feerik decide what the prices would be but i was thinking something like 200 for the 10 one and 700 for the 30 one) and with a bigger energy bar people would have to by more energy recharges to fill it

i think this is a good idea

Why thank you, glad someone likes the idea