Because of the low mana, why not get mana after every kill as that would solve the problem of low mana. something like 1 mana point after every 5 kills?
Could you add that feature where you could hover your mouse over an enemy and see their statistics? And also the amount of experience they give. If you could add that it will be really appreciated by me and probably other people as well. Thanks!
PS. loving the games so far!