2 things... first a multiplayer option would be good you could set the matchmaking based on player levels and give arena rewards with which you can buy new weapons in an arena market. second this game is too easy only people interested in leveling up will play it, this could be fixed with the arena theme suggested earlier... right now it's a work in progress 2/5
 "Specter Knight"){kind=icon}
 "Tanki Online"){kind=icon}
 "Territory War 3 Kong"){kind=icon}