While working on Urban Rivals, since several months we are developing our new title : Fantasy Rivals, a trading card game taking place in a fantasy universe. You will find the game type you like again, but with new game mechanics and an original universe. To be notified when the game is available and to sign in the private Beta which is going to start in the next few days, check out this page now.
While I do agree that levelling up the characters shouldn't be made too easy, but with the current standing it simply kills the Joy of playing the game. It takes 1000 gems to level up from Level 1 to 2, 1500 from Level 2 to 3, 2500 from Level 3 to 4, and a whopping 4000 gems from Level 5! And a win against the computer in the training mode only nets you 175 gems.
Considering the fact we are still in closed beta, setting such requirements really discourages most players from getting the full experience and playing out the game thoroughly to report bugs and such.