Okay, time for something a bit more productive.
So, back in the day, there was this huge flash game which I absolutely loved and it was helluva difficult, too. It was called N. It's a simple idea with a platformer and each level consist of one screen. The controls were great in this one and it was loads of fun.
3 days ago N++ has been released (so a sequel to N+ which I haven't played, seems like XBLA exclusive) and it's getting already amazing reviews. The sheer number of levels and their variety is outstanding and I'd probably highly recommend it, without playing it. Sounds fishy, but I'm just telling you this because you can try N for free on their site:
http://www.thewayoftheninja.org/ The free version consists of 100 levels and should give you a taste of what N++ could be.