At first glance it's great, but I'm pretty sure Q-bert is a direct copy and paste from the original artwork, and I agree about the Tetris blocks, and the power button balloon looks bizarrely sexual and out of context. And it's on white why?
If the whole thing were hand-drawn or at least all in the same style, that'd be a big plus. As is it's very patchwork and disappointing.
About my design