Hello. Many times after I finish level (field H3 with some battle traits), when the screen after end of battle appears it shows that I should get many XP (80 000 - for me it's many !). But when I return to map, those XP are not added and my level won't go up.
I just tried H3 myself and xp is being added fine, so I have to ask how much xp do you have on it? if it's greater than that 80k you'll gain none of it.
yup, this is true of all gemcraft games, to gain more exp: take on early levels that you have low exp totals on, you'll easily be able to beat your previous high score and game more exp, that lets you take on tougher levels and beat your high scores on those levels, which makes you even stronger so you can gain even more exp... you get the idea.