The title screen definitely got my blood pumping (as did both sets of gameplay). Though as Quinadin already pointed out, they could have been partnered together better even if it just included a screen transition into Space Invaders gameplay. However, the experience of both classic games is still present and fun.

I'll be honest when I read the name Tetris Invaders I thought I'd be shooting rows of rapidly descending aliens into the correct shape to complete my Tetris rows. Instead I intermittently played Tetris and Space Invaders. Which is fine because they're both fun games but I feel you could've gone a lot further with this concept.