Good job on the speech and instructions. I'd echo what other people are saying that it's pretty confusing, and I'd add that part of the confusion comes from the delay when selecting units. The heart doesn't appear for a second so it seems like nothing is happening.
For tutorial improvement, I think it could be a little more iterative, after step 3 or 4 it sort of just gives you the rest of the instructions at once and its a lot to process.