This is a really good mix, I had played a similar game in the past where you had to destroy balloons by drawing the shapes on the screen, but I think that you added a really good twist for it with the abilities, creating different skills.
Would be nice if you could add a version where you could type random words, instead of drawings, to make it easier to play on the PC.
But other than that, it's a really good entry, good job :)