Use arrow keys to change the block's position. Use the scrolling bars to move the block. Press <Q> to show the next block. Press <E> to show the previous block.
I saw people missed the April Fool's Cat Hat Blocks, so I made them into a viewable 'gallery' project. I apologise I haven't shared anything in a while, but I was away on holiday. I'm back now, so I'll be posting again.