Jet Set Willy

Jet Set Willy is another of those strange games where you jump around impossibly difficult screens and avoid weirdly abstract bad guys. The story behind this one is that, having just bought a mansion and had a huge house-warming party, his housekeeper won't let him into his bedroom until he gathers all the trinkets from around the mansion's grounds that his guests have scattered about. So instead of firing her on the spot, Willy sets out to do just that.
the rooms are full of hazards such as static killer objects, and guardians which move along predetermined paths. Willy loses a life if he touches an enemy or falls too far, resulting to the point at which he entered the room.
The truth is that you'll never be able to finish this game! Ever! Despite being supplied with an unholy amount of lives, this game set new standards in difficulty back in the mid 80s! The mansion is too huge, the monsters are too plentiful, and it doesn't even tell you how many items are left to get! Nevertheless, a fun and addictive game that is!

The game was originally designed for the 48k Spectrum, and thus graphics are somewhat simplistic, but colorful. Sprites are tiny but beautifully animate, and overall the action is pretty fast, making the game very playable as long as you master the controls (especially when jumping to avoid hazards). In general, for an 8bit in the mid 80s platform game, it looks good.
There are also a few simplistic (and rather funny) sound effects during gameplay, whilst the introductory tune is the Beethoven's Moonlight Sonata!