Worked on it a bit more. I added the cracking effect, the next game, and the structure for the next. I also tweaked the snake game a little. Try it out (opens in new tab):
Note: I know you can't kill the space invaders. That's a part of the game; you have to wait until your impending doom.
Note 2: I know the last game there is just wrong all round, I'm fixing it.
Note 3: Most of the graphics are just stand-ins.