Hard Difficulty add please

[RossGames]

It'd be awesome to have one or two more harder difficulties or more waves on Kingdom Rush 1. No doubt it is an awesome game and I know you guys are working on KR2, but I wanted to mention it. I play so much KR1, making up my own challenges. If you added a harder difficulty I'd buy it for an additional $.99. Thanks again for the game. I truly am addicted.