It's a big misconception that user testing is luxury, even for very small or one person teams. Applying some of the most basic principals can save you a ton of

It's a big misconception that user testing is luxury, even for very small or one person teams. Applying some of the most basic principals can save you a ton of wasted effort. In nearly every case it will make you much more productive / efficient. The earlier you catch the mistakes, the easier to fix them. Check out the 'discount usability' movement. Much of it is written for web / mobile development but the principles are pretty much universal and can be applied to both game design and/or interactive learning aids (in your case the tutorial). If nothing else read up on how to run a usability test. Without even being an expert it will help you get much more out of your testing.