Quick little project to test keyboard ghosting. ( See topic http://scratch.mit.edu/discuss/topic/36143 ) This happens when the way YOUR SPECIFIC KEYBOARD is wired means it cannot detect certain keys being held down together. Most keyboards can reliably detect most combinations of 3 keys being held down. However, there are often 3-key combos that cannot be detected - for example, left+up+down arrows at once. NOTE THAT DIFFERENT KEYBOARDS ARE WIRED DIFFERENTLY, which means that they will behave in different ways. Typically, more expensive keyboards will deal better with ghosting (surprise!), and so will be better for complicated games that require simultaneous, or very quick, key combos. Here's a link that helps explain more about ghosting: https://geekdroids.com/keyboard-ghosting-explained/ If you have a fairly standard (i.e. cheapish) keyboard (often, the keyboards built into laptops are not great for ghosting too), you can use this project to check which key controls you should avoid for two-player game (i.e. two players on the same keyboard). The layout used here corresponds to a typical UK Mac laptop (i.e. like mine). However, you can drag the keys to wherever you want. :) Note that there will be many keys that certain keyboards have which are not shown here, but Scratch can only detect letters a--z, digits 1-9, space and arrow keys anyway (without hacking the key pressed block, at least...)
