Here is a link to a Kahoot game on the Future Perfect: Duplicate of Future perfect.  It is, as the name implies, a duplicate of an already made Kahoot I found by searching the website: Future perfect by Cixtlalli.  I made my own copy because I thought number 8 was wrong and number 9 was out of date on the original, so I fixed them.  Also note that there are a couple questions near the end of the Kahoot which also bring in future perfect continuous.