Thanks for giving Panda Monium a try ! Just a heads-up : it's a pinball-style game, but instead of flippers, you control two paddles.
The game runs in its own 700x600 window. For the controls to work, you need to make sure the game window is active. If pressing ENTER(to revive the ball) and SPACE (to restart) doesn't do anything, just click inside the game window to 'focus' it. Hope that helps !