All of the games are simple to play and require only a few keystokes/mouse clicks to finish. The game doesn't give you instructions for all of the games, just a general goal like "finish," "avoid," or "drink." Some mini-games include platformers, shooting, mashing a button real fast, etc. You'll likely lose on some of the games but all of the controls are fairly easy.
There isn't much down time between games as well, so the entire game can get pretty chaotic. The fast-pacing of it however, is what will keep you hooked. There's also a boss in the final section that will give you more mini-games to play if you don't beat him in time.
UPDATE: Since it is Friday I also post at WillandBeyond. Click here to see my post.