It took me a couple of tries to understand how it worked, but reading the description helped. The place where the syringe appears is perhaps the most confusing part of all, and I don't think I would have figured it out if I hadn't read it directly. Once you know what each thing does and how it works, the stress begins of trying to keep everything at the levels they should be considering the passage of time. It's very stressful, and it always dies on me because of the decay... Poor thing!