After all these years, and growing up with Windows 3.1, I have seen an entire evolution of computers and software. Touch screens and large resolutions were a pipe dream just 15 years ago. Now it's the norm. Going from a Packard Bell (yes, before HP) that couldn't run 3D Ultra Mini...
Smaller moves are more accurate than big sweeping ones, so try and stay calm.
Learn the pattern of each obstacle and you'll be ready to face whatever comes.
Give your sphere a wiggle when you start to make sure you know which way you're facing.