3. Distance Games
Distance games are the mini golf of flash games. Mini golf is it's own genre, but distance games are better at mini golf than real mini golf games. Not based so much on skill as pure dumb luck, there's something satisfying about picking distance and strength, then seeing your penguin bounce endlessly across the board with the help of snakes or explosions. Distance games are great time wasters. Play once, or a hundred times. It's always satisfying to break your own record, even if you barely contributed to your achievement.
2. Jenga Physics
Remove elements from a structure without making everything collapse. Or add elements to a structure without making everything collapse. Or add dynamite to a structure until everything collapses. If you enjoyed playing with blocks as a kid, you'll enjoy Jenga-physics games. If you didn't, what, could you not afford blocks? Jenga-physics games make blocks even more fun by adding real tangible goals and making you use your brain. Well, maybe not more fun. Build a Block Tower and Smash it with Toy Cars would make a great Flash game.
1. Simple Escape Games
Lately there's been a surge in simple games where you use one or two buttons to jump and duck as your character runs frantically to the right for their own life. There's usually an apocalypse chasing them. These fun reflex exercises can be traced all the way back to the old, single-button "helicopter-in-a-cave" game. Not much has changed except the setting. No longer are we limited to helicopters, now there are building jumpers, dinosaurs and Japanese business men crashing through walls. It doesn't matter, as long as you push the button at the right time. They're the perfect game to play if you only have two minutes. Two minutes is easily 19 games, unless you're really good. Then it's only 16 games. And, for the record, flying a helicopter in a cave is a terrible idea.