Click on a ZX Spectrum Game Screenshot, then play.
If you have a half-decent computer from the last few years, and are using Microsoft Internet Explorer with a Java VM Enabled,
 

If it doesn't work, you need to install a Java Virtual Machine (VM)
Some versions of Windows have the Microsoft Java VM already installed, but some won't.
Visit www.java.com/getjava/ to get the latest VM from Sun in order to play these games.

Manic Miner

Booty